LUMEL N32P-09 Digital Panel Meter User Manual

DIGITAL PANEL METER
N32PSERVICE MANUAL

Application

The N32P meter is a digital panel meter adapted to be fixed to the panel. The N32P meters are designed to measure voltage, current, power and energy in AC circuits. Voltage and current measurement can be dome directly or using an external current and voltage transformers. The parameters of the transformers used can be configured in the N32P meter, so the indicated measuring values will correspond to the actual measuring values on the primary of the transformers. The N32P meters also enable to measure only a single parameter, e.g. only current, where the meter operation is synchronized with the current signal waveform.
Additionally, the meter supports the programmable alarms with the delay activation and deactivation function as well as a memory of the alarm event. The functionality of the meter is complemented by a programmable analog output – RS-485 interface.
The user interface consists four buttons and the high contrast LCD display with backlight. Thanks to the two-line display, it is possible to set the selected unit, display simultaneously the measuring value and the current time, as well as a clear and user friendly menu with simultaneously visible the parameter name and its value.
Features of the N32P meter:

• Wide range of measured voltages.
• Programmable current range of 1 A or 5 A.
• Possibility to synchronize the zero crossing detector with the current signal.
• High sampling frequency of the measuring signals.
• Wide measuring ranges including high peak of the current values and large values of exceeding the measuring range.
• Programmable parameters of external current and voltage transformers.
• Galvanic separation between the voltage measurement and the current measurement circuits.
•  Measurement of voltage and current harmonics.
• High contrast LCD display with built-in backlight.
• Two-line display.
• Automatic selection of the unit of the measured (displayed) value.
• Measuring value preview mode.
• Possibility to simultaneously display two selected measuring quantities or a measuring quantity and e.g. a unit or time.
• Programmable display precision with the function of automatic setting of the decimal point and the multiplier (kilo, mega) displayed with the unit.
• Possibility to program the measuring range (narrowing) for the selected displayed value.
• Additional measurement of minimum and maximum values during the moving window, with the possibility of programming one of these values to be displayed as the main one.
• Selection of the period and averaging method with the possibility of synchronizing the average value with the built-in real-time clock.
• Programmable alarms with the functions of programmable delays of alarm activation and deactivation, triggered by a specific controlling value. Up to 4 relays, including up to 3 relays with a switching contact. Possibility to configure each of the alarms to work in a selected mode and to react to any measuring quantity including the current time.
• Possibility to control the alarm outputs (relay) via the RS-485 interface.
• Programmable standard analog outputs enabling the retransmission of a selected measuring quantity or a selected parameter. Freely programmable output type and conversion range.
• Built-in by default RS-485 interface with MODBUS RTU protocol support.
• Built-in real-time clock with a built-in automatic change of DST and inversely. The clock can be a parameter which controls the alarms and the value of the analog output signal.
• Possibility to password protect the settings against unauthorized modification.
• Monitoring of set parameters.
• Programmed averaging time – averaging algorithm in a specified time using standard averaging (determining the number of measurements to be averaged) and averaging based on the moving window algorithm with a given averaging time.
• Signaling of alarm operation by highlighting the number of the active alarm.
• Registration of minimum and maximum measuring values.
• Galvanic separation of the connections: alarm, measurement, analog outputs, auxiliary supply outputs, RS-485 interface and supplying input.
• Protection degree from the front IP65.
• Meter overall dimensions 96 x 48 x 100 (with the terminals).
• The casing is made of a self-extinguishing plastics.
• Wide range of supply voltages.

The view of the N32P meter is shown in Fig. 1.

Meter set

The meter set includes:

• Meter N32P – 1 pc
• Clamps to fix in the panel – 4 pcs
• Seal – 1 pc

Basic requirements, operational safety

In terms of a user safety, the N32P meter meets the requirements of the EN61010-1 standard for the devices intended for use in facilities compliant with the third category of installations.
Comments concerning safety

• Assembly and installation of the electrical connections should conducted only by a person authorised and certificated to perform assembly of electric devices.
• Always check the connections before turning the meter on.
• The meter is designed to installation and usage in the industrial electromagnetic environment.
• A switch or a circuit-breaker should be installed in the building or facility. The switch should be located near the device, easily accessible by the operator and suitably marked.
• Removal of the meter electronics during the warranty period voids the warranty.

Installation

4.1 Installation method
The N32P meters are designed to be mounted in a panel. Prior to installation a 92 +0.6 x 45+0.6 mm slot must be made in the panel. The maximum thickness of the panel material cannot exceed 6 mm. The meter should be mounted from the front of the panel with disconnected meter connection strips.
Before inserting the meter into the panel check the correct position of the meter seal and make sure that the edges of the panel are not sharp what could damage the seal. After inserting the meter into the slot, mount it with the mounting brackets provided in the meter set (Fig. 2).

Electrical connections of the meter should be made with the wires with the cross-section up to 2.5 mm² . Detachable sockets with the plugs of 5.08 mm pitch can be used for the connections.

The external dimensions of the meter are shown in Fig. 3.
4.2 External connection diagram
The N32P meter has three detachable terminal strips to connect the wires of a crosssection up to 2.5 mm². The view of the meter from the connectors’ side is shown in Fig. 5.
The upper terminal strip is optional and depends on the accessories of the meter.
The circuits of successive groups of the terminals are separated from each other, as shown in Fig. 4.

Note: Unused terminals of the terminal strips (NC) must not be connected to any signals.

Detailed description of the signals is shown in the table below, and the connection of the measuring signals is shown in Fig. 6.

voltage and current or for connecting the external transformers. Examples of the connections are shown in Fig. 6.
9, 10, 11| RS-485| RS-485 interface signals
12, 13| Alarm 1| Alarm output 1, which is NO relay contact.
15, 16| Power supply| Meter power supply connection. Range of supply voltages supported by the meter depends on the ordering code. It is required to check if the rated range of the meter corresponds to the installation to which the meter will be connected before installing the meter.
20…28| Alarms 2, 3, 4 (optional)| The alarm outputs 2, 3 and 4 use a relay with a switching contact.
30…33| Analog output| Analog output. The output must be properly connected according to the type of output selected in the configuration (voltage or current): the terminals 30 and 31 for the current output or the terminals 32 and 33 for the voltage output. It is not possible to use the voltage and current outputs at the same time – the correct value in accordance with the configuration, will be available only for the selected output type.
34, 35| Binary output| Open collector binary output. Pulse output of the imported or exported energy counter.
3,7, 14, 29| NC| Unused terminals. Should be left unconnected.

The connection of the basic measured signals is shown below. The N32P meter can also be used to measure only voltage or only current.

Service

The N32 meter user interface includes an LCD display and the buttons which enable to display the measuring value, a full configuration and setting of the meter or modification of the parameters.
After turning the meter on the display shows the name of the meter and the software version. If there is no error during meter initialization process, the meter will switch to displaying the measuring value. If during the initialization any irregularities or deviations are detected, than a message with information about a detected error will be displayed (see point 6 – Error codes).
5.1 Description of the frontal plate
View of the front panel of the meter is shown in Fig. 6. The LCD display with backlight and 4 buttons are on the front panel. The description of the display fields is shown below. The button functions are shown in the section 5.2.

measuring value or a parameter value during the meter configuration.
L2| The lower (auxiliary) line of the display has 5 characters used to display a measuring value, not converted by the individual characteristic or, according to configuration, a unit or current time.
k| The kilo symbol means that the displayed value is divided by a thousand, e.g. when the setting is displayed, the illuminated symbol means that the given value is a thousand times greater. For example, 1.2 kA means 1200 A.
Z1| Measuring value averaging indicator. Illuminated averaging indicator informs that the set measuring value averaging period has not elapsed yet.
M| The mega symbol means that the displayed value is divided by a million, e.g. when the setting is displayed, the illuminated symbol means that the given value is a million times greater. For example, 3.5 MW means 3,500,000 W.
ALI| Alarm status field. This field contains the indicator informing about the alarm status. Illuminated alarm indicator means that an alarm event is in progress and the relay corresponding to the alarm is activated. Flashing symbol means that the alarm state is saved (if the alarm memory is activated).
B1…B4| Meter operation buttons. The description of the button functions and their various combinations are shown in section 5.2.

The lower line of the display can be configured to display the unit, where the unit is automatically adapted to the displayed value of measured quantity and depends on set indication range. For example, if a transformer with a rated range greater than 1000 A is connected, the current will be displayed in kilo amperes (kA).
Additionally, the lower line can display a selected value of measured quantity (measured or calculated quantities) or the current time.
5.2 Buttons’ functions

| Cancel button:
• Exiting the menu and exit to the main screen.
• Exiting a lower level of the menu and return to a higher level.
• Canceling changing the set value (when editing the parameter value)
• Entering the measuring value preview mode – hold down the button for
at least 3 seconds.
---|---
| Digit change button:
• Navigating the menu – decreasing the items of the menu.
• Decreasing the controlled quantity while editing a parameter and setting selection from the list of settings, e.g. alarm type.
• Changing the controlled digit when setting numerical parameters.
• Pressing the button during a normal operation displays a minimum value for 2 seconds, then the display returns to displaying a measuring value.
| Increase value button:
• Navigating the menu – increasing the items of the menu.
• Increasing the value of the selected parameter or increasing the value of a digit when changing the numerical value.
• Pressing the button during a normal operation displays a maximum value for 2 seconds, then the display returns to displaying a measuring value.
| Confirm button:
• Entering the programming mode (holding down the button for at least 3 seconds).
• Navigating the menu – entering the parameter value editing mode or entering the selected lower level of the menu.
• Accepting the changed parameter value.
• Viewing the measuring values in the preview mode.
| Deleting minimum value. DELMIN message is displayed after deleting. To avoid accidentally exit the menu in the preview mode, it is recommended to press first the button , and then the button  and holding them until DELMIN message is displayed.
| Deleting maximum value. DELMAX message is displayed after deleting. To avoid accidentally exit the menu in the preview mode, it is recommended to press first the button , and then the button  and holding them until DELMIN message is displayed.
| Deleting alarm memory – hold down the buttons for 3 seconds. ClrAL message will be displayed after deleting alarm memory.

All the events of deleting of saved minimum, maximum values and alarm activation memory are indicated by the meter by displaying an appropriate message.
5.3 Programming meter parameters
Programming meter parameters is possible via the RS485 interface and by direct edition of the parameters using the buttons and the meter display.
Direct programming process is easy thanks to meter menu, which includes the settings grouped into sections with all parameters related to a given functionality, e.g. all parameters of the serial interface are grouped in the menu .
Pressing and holding the confirm button for at least 3 seconds allows to switch from a normal operation to meter menu . If access to change the parameters is password protected, the user will be requested to enter the access password before entering the menu. Entering an incorrect password will allow to enter the menu but it will be not possible to change the parameters – parameters monitoring mode. Entering a correct password will allow to move to a programming matrix, the menu after entering the programming mode is shown below.

While navigating the meter main menu with the groups of the parameters, the upper line of the display shows the name of the group and the lower line continuously displays the word MENU. After entering the group of the parameters (after pressing the confirm button), the upper line displays the value of a given setting and the lower line shows the name of the parameter which value is displayed in the upper line. Sample view of the selection of the measured input signal type is shown in Fig. 9.

The buttons allow to navigate the menu of the meter. After selecting the group of the parameters which configuration is to be changed, press the confirm button to move to the parameters of the group. The parameter which value is to be modified is
selected the same way as the selection of the group. To cancel the parameter change, press the cancel button to exit the parameter changing mode or the parameter group. The meter will automatically exit the programming mode and return to displaying the measuring value if no button is pressed for 30 seconds during programming. The programming matrix is shown below.

| Voltage measuring range selection.| Current measurement range
selection| Selection of the synchronization
source| Rated voltage of the voltage transformer primary| Rated voltage of the voltage transformer secondary
---|---|---|---|---|---
Rated voltage of the current transformer primary| Rated voltage of the current transformer secondary| Single measurement time as a multiple of 100 milliseconds.| Selection of measuring quantities
values averaging method (standard or moving window
method).| Measuring quantities values averaging period in minutes.
Averaging synchronization with
the time clock.| Value entered into the import energy counter when resetting the counter.| Value entered into the export energy counter when resetting the counter.| Pulse weight on a binary output| Selection of the counter controlling the binary output
Reset (enter initial value) energy
counter.| | | |
| Selection of main displayed value.| Minimum value on the display. For values lower than this value, a lower overrun message is displayed.| Maximum value on the display. For values higher than this value, an upper overrun message is displayed.| Resolution – position of the decimal point.| Function of a lower line of the display – selection of a quantity displayed in the lower line.
| Selection of quantity controlling the alarm state.| Selection  of  alarm type.| Alarm state change lower threshold.| Alarm state change upper threshold.| Alarm activation delay.
Alarm deactivation delay.| Active alarm memory.| | |
| Meter network address.| Transmission frame type – data format.| Baud rate.| |
| Selection of the type of analog output used.| Selection of value controlling the
analog output.| Value of the controlling quantity
for which the output will have a minimum value, in accordance with the selected output type.| Value of the controlling quantity
for which the output will have a rated value, in accordancewith the selected output type.| Value on the analog output in case of manual control or an error on the measuring input.
| Current time according to the
internal clock.| Current date according to the
internal clock.| Automatic change of DST and inversely| Password to protect against settings modification.| Restore default settings

5.3.1 How to change quantity of a selected parameter
To increase the value of the selected parameter, press the button . Pressing the button will increases the currently set digit by 1 and after reaching the value 9, pressing the button will set the value 0. After setting the required value of a digit, move to the next digit by pressing the button . After setting the required parameter value, press the confirm button to accept the entered value or the cancel button to cancel the parameter change and return to the previous value of the parameter. It is possible to change a sign of the entered value during setting the last digit (most significant).
There are three steps to change the floating point values. The first step is to set the digits and a sign in accordance with the algorithm described above. The second step is set the position of the decimal point after pressing the confirm button. The buttons are used to set the position of the decimal point. After setting the decimal point position as required, press the confirm button to move to the third step – setting the multiplier of kilo, mega or no multiplier. Symbol of the multiplier value is shown on the left side of the display.
Entering an incorrect value of a given parameter causes that the new value is not accepted and the parameter will automatically have the previous value. To change the parameters other than numerical select the appropriate setting from the parameter list using the buttons . After selecting the appropriate setting, press the confirm button to download the setting or the cancel button to return to the previous value and exit the parameter change mode.
5.3.2 Programmable meter parameters, default parameters
The N32U meters have a number of programmable parameters, which enable the meter to be adapted to the requirements of application. The parameters grouped according to the menu are shown in the tables below.
Table 1

Parameter symbol| Description| Range of changes
| Voltage measurement range in voltage measurement loop| Default : 230V
100V – rated measurement range 100 V
230V – rated measurement range 230 V
400V – rated measurement range 400 V
| Current measurement range in current measurement loop| Default : 5A
1A – rated current measurement range 1 A
5A – rated current measurement range 5 A
| Selection of the measurement synchronization source – the quantity controlling the zero
crossing detector| Default : SYN U
SYN U – measurement synchronization with measuring voltage.
SYN I – measurement synchronization with measuring current.
Note: The measurement synchronization with measuring current is recommended only when the meter is used only for current measurement, because the current waveform has
higher variability and the current waveform may be highly distorted.
| Rated primary voltage of the connected voltage transformer in volts| Default : 100
0…200000
Note: UPRIM and USEC define the voltage ratio that directly affects the measuring values of the parameters measured by the meter. The parameters UPRIM and USEC should be set to the same value, if the voltage transformer is not used in the system.
| Rated secondary voltage of the connected voltage transformer in volts| Default : 100
0…200000
| Rated primary current of the connected current transformer in amperes| Default : 5
0…200000
Note: IPRIM and ISEC define the current ratio that directly affects the measuring values of the parameters measured by the meter. The parameters IPRIM and ISEC should be set to the same value, if the current transformer is not used in the system.
| Rated secondary current of the connected current transformer in amperes| Default : 5
0…200000
| Time of a single measurement as a multiple of 100 ms| Default : 10
1…600
| Method of calculating the average value| Default : MOVING
MOVING – the average values of voltage, current and power are calculated based on a moving window method, where the average value is updated after each measurement.
Note: The average value can be updated every few measurements in case of long averaging times or short measurement time, due to the length of the measurement table with maximum of 1800 elements.
StAnd – the average value is calculated after each lapse of set averaging time. The previous average value (for the previous period) is displayed until the averaging time is
completed.
| Averaging period of the measured voltage, current and power values in minutes.| Default : 15
1…60
| Synchronization of counting the average value with the internal time clock.| Default : OFF
OFF – Synchronization is disabled.
ON – Synchronization internal real time clock is enabled. This setting takes effect only if the set averaging period is 60 minutes divider, e.g. 10, 15, 20, etc.
| Initial value of the import energy counter. The value is assigned to the energy counter during a reset/setting the counter.| Default : 0
-99999E+6…999999E+6
| Initial value of the export energy counter. The value is assigned to the energy counter during a reset/setting the counter.| Default : 0
-99999E+6…999999E+6
| Pulse weight in kWh, portion of an energy corresponding to one pulse on the binary
output.
The EP W value determines at what change of the energy counter one pulse will be assigned to the binary output.| Default : 1
0.001…999999 [kWh]
| Selection of the energy counter controlling the binary output.| Default : EN_POS
EN POS – pulse output represents counting energy by the
import energy counter.
EN POS – pulse output represents counting energy by the
export energy counter.
| Reset / set energy counter| Default : OFF
OFF – Do nothing
ON – Reset a counter. The parameter is automatically set to OFF after resetting the counter (setting the values from ERV P and ERV N parameters); during the reset, content of the active energy counters is set based on ERV P and ERV N parameters, and the reactive and apparent energy counters are reset.

Parameter symbol| Description| Range of changes
| Selection of the main value displayed on the top line of the display.| Default : U
U – currently measured voltage value.
I – currently measured current value.
P – currently measured active power value.
Q – currently measured reactive power value.
S – currently measured apparent power value.
PF – power factor as the P/S power ratio calculated based on the power triangle.
tAN – angle tangent as the Q/P power ratio calculated based on the power triangle.
FREQ – currently measured frequency.
En P – import energy counter.
En N – export energy counter.
En QC – import reactive energy counter which has flowed through the circuit – it is the absolute value (module) of reactive energy counter.
En QC – export reactive energy counter which has flowed through the circuit – it is the absolute value (module) of
reactive energy counter.
En S – apparent energy counter which identifies the actual energy demand of the circuit.
AVG U – voltage mean value in a given averaging period.
AVG I – current mean value in a given averaging period.
AVG P – active power mean value in a given averaging period.
AVG Q – reactive power mean value in a given averaging period.
AVG S – apparent power mean value in a given averaging period.
MIN U – voltage minimum value in a given averaging period.
MAX U – voltage maximum value in a given averaging period.
MIN I – current minimum value in a given averaging period.
MAX I – current maximum value in a given averaging period.
MIN P – active power minimum value in a given averaging period.
MAX P – active power minimum value in a given averaging period.
MIN Q – reactive power minimum value in a given averaging period.
MAX Q – reactive power minimum value in a given averaging period.
MIN S – apparent power minimum value in a given averaging period.
MAX S – apparent power minimum value in a given averaging period.
Note: The averaging period is defined by AVGPE setting.
| Display narrowing lower threshold. If the value to be displayed is below the threshold, the lower limit symbol is displayed| Default : -99999
-99999M…999999M
| Display narrowing upper threshold. If the value to be displayed is above the threshold, the upper limit symbol is displayed| Default : -99999
-99999M…999999M
| Resolution, display format as the position of the decimal point.| Default : 0000.00
000000
00000.0
0000.00
000.000
00.0000
0.00000
AUTO – automatic position of the decimal point for maximum possible resolution.
| Selection of the parameter displayed in the lower line of the display.| Default : UNIt
UNIt – unit
U – currently measured voltage value.
I – currently measured current value.
P – currently measured active power value.
Q – currently measured reactive power value.
S – currently measured apparent power value.
PF – power factor as the P/S power ratio calculated based on the power triangle.
tAN – angle tangent as the Q/P power ratio calculated based on the power triangle.
FREQ – currently measured frequency.
En P – import energy counter.
En N – export energy counter.
En QC – import reactive energy counter which has flowed through the circuit – it is the absolute value (module) of
reactive energy counter.
En QC – export reactive energy counter which has flowed through the circuit – it is the absolute value (module) of
reactive energy counter.
En S – apparent energy counter which identifies the actual energy demand of the circuit.
AVG U – voltage mean value in a given averaging period.
AVG I – current mean value in a given averaging period.
AVG P – active power mean value in a given averaging period.
AVG Q – reactive power mean value in a given averaging period.
AVG S – apparent power mean value in a given averaging period.
MIN U – voltage minimum value in a given averaging period.
MAX U – voltage maximum value in a given averaging period.
MIN I – current minimum value in a given averaging period.
MAX I – current maximum value in a given averaging period.
MIN P – active power minimum value in a given averaging period.
MAX P – active power minimum value in a given averaging period.
MIN Q – reactive power minimum value in a given averaging period.
MAX Q – reactive power minimum value in a given averaging period.
MIN S – apparent power minimum value in a given averaging period.
MAX S – apparent power minimum value in a given averaging period.
clock – current time.
Note: The averaging period is defined by AVGPE setting.

Parameter symbol| Description| Range of changes
| Input value controlling the alarm.| Default : U
U – currently measured voltage value.
I – currently measured current value.
P – currently measured active power value.
Q – currently measured reactive power value.
S – currently measured apparent power value.
PF – power factor as the P/S power ratio calculated based on the power triangle.
tAN – angle tangent as the Q/P power ratio calculated based on the power triangle.
FREQ – currently measured frequency.
En P – import energy counter.
En N – export energy counter.
En QC – import reactive energy counter which has flowed through the circuit – it is the absolute value (module) of reactive energy counter.
En QC – export reactive energy counter which has flowed through the circuit – it is the absolute value (module) of reactive energy counter.
En S – apparent energy counter which identifies the actual energy demand of the circuit.
AVG U – voltage mean value in a given averaging period.
AVG I – current mean value in a given averaging period.
AVG P – active power mean value in a given averaging period.
AVG Q – reactive power mean value in a given averaging period.
AVG S – apparent power mean value in a given averaging period.
tIME – current time.
Note: The averaging period is defined by AVGPE setting.
| Alarm type (see section 5.4.3)| Default : H-oFF
n-on – normally enabled
n-oFF – normally disabled
on – enabled
oFF – disabled
H-on – permanently enabled (manually)
H-oFF – permanently disabled (manually)
REG – the state controlled by the MODBUS protocol register.
| Alarm state change lower threshold.| Default : 10
-99999…999999
| Alarm state change upper threshold.| Default : 20
-99999…999999
| Alarm activation delay – the duration in seconds of the alarm state before activating the alarm relay.| Default : 0
0…900
| Alarm deactivation delay – the duration in seconds the state without the alarm before deactivating the alarm relay.| Default : 10
0…900
| Alarm signalization latch. When the function is enabled, after the alarm event ends, the display indicator informing about the alarm status will be flashing signaling the alarm until it is canceled by a combination of buttons or via the RS-485 interface.| Default : OFF
ON – alarm memory is activated.
OFF – alarm memory is deactivated.

Parameter symbol| Description| Range of changes
| MODBUS network meter address| Default : 1
1…247
| The transmission frame type of RS-485 interface. Setting the parity bits and the number of stop bits.| Default : F8N1
F8N1
F8N2
F8O1
F8E1
| RS-485 interface baud rate.| Default : 9.6k
2.4k – 2400 b/s
4.8k – 4800 b/s
9.6k – 9600 b/s
14.4k – 14400 b/s
19.2k – 19200 b/s
28.8k – 28800 b/s
38.4k – 38400 b/s
57.6k – 57600 b/s
115.2k – 115200 b/s

Parameter symbol| Description| Range of changes
| Selection of the operating mode and the type of analog output used with the option of switching off the output and manual setting theoutput value.| Default : OFF
OFF – Output support is disabled.
4 20MA – current output 4…20 mA.
0 20MA – current output 0…20 mA.
0 10V – voltage output 0…10 V.
MAN I – current output. The output value corresponds to the AnMAN setting.
MAN U – voltage output. The output value corresponds to the AnMAN setting.
| Input quantity controlling the analog output| Default : U
U – currently measured voltage value.
I – currently measured current value.
P – currently measured active power value.
Q – currently measured reactive power value.
S – currently measured apparent power value.
PF – power factor as the P/S power ratio calculated based on the power triangle.
tAN – angle tangent as the Q/P power ratio calculated based on the power triangle.
FREQ – currently measured frequency.
En P – import energy counter.
En N – export energy counter.
En QC – import reactive energy counter which has flowed through the circuit – it is the absolute value (module) of reactive energy counter.
En QC – export reactive energy counter which has flowed through the circuit – it is the absolute value (module) of reactive energy counter.
En S – apparent energy counter which identifies the actual energy demand of the circuit.
AVG U – voltage mean value in a given averaging period.
AVG I – current mean value in a given averaging period.
AVG P – active power mean value in a given averaging period.
AVG Q – reactive power mean value in a given averaging period.
AVG S – apparent power mean value in a given averaging period.
tIME – current time.
Note: The averaging period is defined by AVGPE setting.
| Displayed (measured) value for which the analog output will have a rated minimum value,in accordance with the programmed output type.| Default : 0
-99999M…999999M
| Displayed (measured) value for which the analog output will have a rated maximum value, in accordance with the programmed output type.| Default : 100
-99999M…999999M
| Value of the signal on the analog output for output value manual control.
Note: The value is set on the analog output after detecting an error on the measuring input.
The maximum possible signal will be generated if the value exceeds the maximum value for a given output type.| Default : 0
0…22

Parameter symbol| Description| Range of changes
| Setting the current time. Confirmation of the time resets the seconds counter.| Default : (not applicable)
00:2359
| Setting the current date in YYYY.MM.DD format, where:
YY – year.
MM – month.
DD – day of the month.| Default : (not applicable)
00.01.01…99.12.31
| Automatic change of DST and inversely| Default : OFF
OFF – automatic time change disabled.
ON – automatic time change enabled.
| Password to access the meter configuration. When the set value is different from zero, each attempt to enter the menu of the meter will require entering a password. In case of providing an incorrect password, it will be possible to enter the menu in the
monitoring mode without a possibility of make any changes.| Default : 0
0…9999
| Restore default settings. Selecting YES setting will restore all settings to the default settings and set FACt setting to NO.| Default : NO
NO – do nothing.
YES – restore default settings (factory).

5.4 Meter functions
5.4.1 Measurement
The N32P meters continuously measure RMS voltage, current and power. They calculate energy, power factor and power tangent based on the measured values. Both, the power factor value and the power tangent are calculated based on the power triangle. Additionally, the voltage frequency is measured during the measurements which is determined by the zero crossing detector. The detector input can be connected to the input voltage or the current loop via SYNCH setting, and the measurements with a current synchronization should only be selected if the meter is used only for current measurement.
Sampling is 8,000 measurements per second. The measuring periods (input signal period) are synchronized with the signal from the internal zero crossing detector. A single measurement is made for the number of periods corresponding to a time of 100 ms. Realtime measurement may slightly differ from the assumed 100 ms due to the measuring signal frequency value. A single measurement time would correspond to 5 periods of the measuring signal at 50 Hz. The user can define the duration of the measurement time by providing the number of single measurements. By default, the measurement time is defined as 10 basic measurements, i.e. one second. When changing the measurement time, it needs to be considered that the shorter the measurement time, the greater the influence of noise on the measuring value, and therefore the lower the stability of indications.
The measuring values are continuously analyzed during averaging, and additionally, the minimum and maximum measuring values are determined during the averaging period, as well as the total minimum and maximum measuring values, which are saved in the nonvolatile memory of the meter.
All measuring parameters are available via the RS-485 interface, including the basic measuring values e.g. voltage on the shunt.
The main displayed value can be limited by the user by specifying the minimum and maximum displayed value. Exceeding set lower threshold of the measurement (the measuring value lower than the set limit value) causes to display information about exceeding the lower limit, and exceeding set upper threshold of the measuring range (measuring value greater than the set limit value) causes to display information about exceeding the upper limit.
All the values of measuring quantities are available through the RS-485 interface and at the parameter preview level. Entry a measuring value preview mode can be done by pressing for at least 3 seconds the cancel button . The currently displayed value can be changed by pressing the confirm button . When previewing the measuring values, its value is displayed in the upper line and the lower line alternately displays the parameter name and its unit. Additionally, it is possible in the value preview mode to check the minimum and maximum values of a given quantity, and to delete them (see section 5.4.1.2). The meter will return to the normal operation if no button is pressed for 30 seconds (the main displayed value defined in the configuration will be displayed).
5.4.1.1 Averaging the measuring quantities
The measuring values are averaged in two stage process. The first stage of averaging – the arithmetic mean is calculated from the indicated number of measurements defined by SAVGt parameter. The parameter also determines the time of a single measurement – one measurement takes 100 ms of time, then for the SAVG parameter set to 10, the time of a single measurement will be one second. There is a single measurement that represents the current measuring value after the first stage of averaging.
Additionally, the average value is calculated for each of the measuring parameters, and the averaging period is defined by the user by defining AVGPE parameter in minutes. The average value can additionally be synchronized with the internal time clock. The method of calculating the average value is defined by the user – AVGtY parameter, which can be selected from the standard averaging method, where the new average value is calculated after the averaging time has finished, or the moving window method, where the average value is calculated continuously from a selected period of time, e.g. for the setting of 15 minutes, the average value represents the average value over the last 15 minutes and is continuously updated. In the given example, if the synchronization is enabled, the average value is calculated from every quarter of an hour, i.e. the minutes of the clock 0, 15, 30, 45 indicate a new averaging period.
The buffers for average value calculation have a length of 600 single measurements, and each of the averaged values has a separate data buffer, therefore the average value calculated by the moving window method can be updated less frequently than it would result from the time of a single measurement. For example, for the averaging period of 60 minutes and a single measurement time of 1 second, the average value will be updated every 6 seconds because in this case the buffer length would have to be 3600 measurements. For the buffer with a length of 600 measurements, each element in this case contains a value of averaging six single measurements.
5.4.1.2 Minimum and maximum measuring values
The N32 meter continuously measures the signal on the measuring inputs and calculates the derived parameters, e.g. power factor. The measuring values are constantly monitored, if the measuring range is not exceeded during the measurement. If any of the values is smaller than the current minimal value of a given parameter, then the new minimal value is saved. When the measuring (displayed) value is higher than the current maximum value of a given parameter, then the new maximum value is saved. The minimum and maximum values are available via the interface and from the panel of the meter. Press the button  to display the minimum value of the main displayed value. Press the button  to display the maximum value. Value minimum / maximum is displayed for 2 seconds, then the meter automatically returns to displaying the measuring value.
Reset of the minimum / maximum value can be done via the interface or directly using the meter keypad. Press a combination of buttons to reset the minimum value, and press a combination of buttons to reset the maximum value. Each reset of the minimum or maximum value using the buttons is confirmed by a message – an example the message is shown below.

To display the minimum and maximum value of the parameters which are not displayed continuously on the display is possible from the measuring value preview menu – to access the menu press and hold the cancel button for at least 3 seconds. Changing the currently indicated quantity after entering the preview menu can be done by pressing the confirm button . The minimum and maximum value for a given parameter can be displayed or deleted in the same way as the main displayed value, but to avoid accidentally exit the menu, it is recommended to press one of the buttons first , and then the button .
5.4.2 Analog output
The N32P meters can have one analog output (depends on the ordering code) connected to the meter terminals as a voltage output (0…10 V output) and as a current output (0…20 mA or 4…20 mA). The analog output is galvanically separated from the other meter circuits. Selection of the output type to be used can be done during the output configuration. It is not possible to use the voltage and current output at the same time because it is physically one output with two signals connected to the terminals. It is very important when using an output to choose the type of it that is actually being used. Otherwise, the output value will not match the expected output signal.
The following parameters should be defined during the output configuration:

• – type of output signal that will be used. Additionally, the manual operation modes are available (separate for the voltage output and for the current output), where AnMAN setting defines the exact expected value on the analog output.
• – setting which defines the quantity that will control the analog output signal.
• – lower value of the control signal in accordance with InPV parameter, which the minimum signal value on the analog output corresponds to.
• – upper value of the control signal in accordance with InPV parameter, which the maximum (rated) signal value on the analog output corresponds to.
• – the parameter has two applications. First, it is the value of the signal (voltage or current) during a manual control of the output. Second, to use a set value when the signal controlling the output has an incorrect value, e.g. exceeded measuring range. In such case the signal on the output will be set according to this setting.

Thus, configuration of the output requires to specify five parameters. An example of an output configuration is shown below.
Let’s assume that the input signal is power and the measuring range will be 500 W and for such range the output should change between 4 … 20 mA. The settings for such case should be as follows:

• AtYPE = 4 20MA.
• InPV = P.
• AnLo = 0.
• AnHi = 500.
• AnMAN = 22. The value on the analog output will be 22 mA in case of a measurement error.

5.4.3 Alarm outputs
The N32P meters are equipped with one alarm output as standard. They can have 4 alarm outputs as an option, including three outputs with a switching contact. The alarm output element are electro-magnetic relays. If the meter is physically equipped with one alarm, 4 alarms are still available in the meter menu. In this case, the alarms 2 to 4 can have a indication functions by controlling the alarm indicator on the screen and via the RS-485 interface (alarm states in the meter registers).
Each alarm output is independently configurable and can be configured to work in one of six modes. It is possible to select the value controlling the alarm (see Fig. 9), define the state change thresholds and define the delays of alarm activation and deactivation. Fig. 11 shows how the alarms work in n-on, n-off, off and on modes. Additional manual working modes H-on and H-oFF enable to permanently activate or deactivate the alarms. An additional REG operation mode has also been added to the alarm type settings. In this mode, the alarm state is controlled via the RS-485 interface by MODBUS protocol registers.

Designations used in the drawing:

• AL_L – corresponds to PrL setting and determines the alarm state change lower threshold.
• AL_H – corresponds to PrH setting and determines the alarm state change upper threshold.

Note: It is important to keep in mind when configuring the alarms that the entered threshold values should match the dependency AL_L < AL_P. Otherwise the dependency will disable the alarms.
Additionally, the alarm functions include the programmable delays of alarm activation and deactivation. The user can define how long the alarm event must last before the alarm relay contacts are switched on and the minimum time of the alarm event end before the relay contacts are switched off. Alarm delays prevent false alarms caused by a short-term change of the measuring value, e.g. during the start-up.
The alarm event could be registered if the alarm memory is enabled.
5.4.4 Binary output
The N32P meters can have a galvanically separated optional binary output, which is designed to generate pulses corresponding to the counting of a given portion of energy by the energy counter. Pulse weight (the amount of counted energy per one pulse and a control counter) is user-defined. This output can be used to transfer information to subsequent counters or PLC controllers, etc.
The binary output has an NPN transistor as the output, its collector and emitter are connected to the output terminals what enables to work with the inputs of the meters supporting the NPN and PNP sensors.
Duration of each generated pulse is 30 ms followed by a pause of also 30 ms. It is important to pay attention to pulse duration during a configuration of the binary output (pulse weight) because too many generated pulses may overflow the internal pulse counter, and consequently, the number of generated pulses will be lower than expected.
The examples of connecting a binary output to a counter in input configuration for NPN (b) as well as PNP (a) sensors are shown below.

The figure above shows the examples of connecting the binary output of the N32P meter to a PLC controller. The diagram in Fig. a shows the controller input to work with PNP sensors, while Fig. b shows a diagram for the controllers to work with NPN sensors.
5.5 RS-485 interface
The N32P meters are equipped as a standard with one RS-485 port connected to the terminals of the lower connector. The interface is galvanically separated from the other circuits of the meter.
The implemented data exchange protocol is compatible with MODBUS RTU standard and allows to save and read all configuration parameters as well as read all measurement data with data including alarm status, current time, date or other parameters related to the meter status. The transducer works in the network as a slave device.
Standard RS-485 allows a direct connection up to 32 devices on a single serial link. The maximum permissible cable length depends on a baud rate, and it is 1200 m for the baud rate 9600 b/s. It is necessary to use additional intermediate-separation circuits e.g. PD51 by LUMEL S.A. to connect more devices or to use a longer connections.
5.5.1 Connection
The terminals A, B and GNDI terminals which location is shown in Fig. 5 allow to connect the RS-485 interface to the N32P meter. It is required to connect the lines A and B in parallel with their equivalents in other devices to obtain the correct transmission.
The connection should be made using twisted pair screened cable in such a way that the A and B lines should be one pair and are connected with their equivalents of other devices in the network. The cable shield should be connected to the protective terminal in close proximity to the N32P meter. The cable shield of the interface cable should be connected to the protective terminal only in one point.
The GNDI line, which is the reference potential for the RS-485 interface, is used for additional protection of the interface line at long connections. Then all GNDI lines of all devices using the same bus should be connected together.
A star connection should be avoided when connecting the devices. The connection should have a bus layout which ends are connected to the termination resistors.
Method of connecting the devices is shown in Fig. 12.

5.5.2 Description of the MODBUS protocol implementation.
The implemented protocol is compliant with the PI-MBUS-300 Rev G specification of Modicon.
It is important to keep in mind when configuring the parameters that the devices using the same bus must meet the following requirements:

• Have a unique address, different from the addresses of other devices connected to the network.
• The same baud rate.
• The same type of transmission mode (single data frame format).

The N32P meters enable programming the following parameters of the RS-485 link:

• Meter address: 1…247.
• Baud rate: 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200 [b/s].
• Operation mode: RTU frame format 8n1, 8n2, 8o1, 8e1.
• Maximum response time: 50 ms.

5.5.3 Implemented functions of MODBUS protocol
The following functions of the MODBUS protocol have been implemented in the N32H meters:

• 03 (03h) – readout of registers group.
• 04 (04h) – readout of input registers group.
• 06 (06h) – single register writing.
• 16 (10h) – registers group writing.
• 17 (11h) – slave device identification.

5.5.4 Map of the registers
The register map of the N32P meter is divided into separate groups of 16-bit or 32-bit registers. Data stored in 32-bit registers are additionally available in the format of 16-bit registers, with the value of one 32-bit register is stored in two 16-bit registers.
The 32-bit registers store data in the float format compliant with IEEE-754. Bytes sequence: B3 B2 B1 B0 – the oldest byte is transmitted as the first. The 16-bit registers representing 32-bit values in two successive registers have been doubled in another address space with a byte sequence: B1 B0 B3 B2.
The table below shows the register map of the N32P meter. The addresses in the table are the physical addresses. The register number should be increased by 1 when using the programs where the addresses are provided in a logical format.

and voltage harmonics.
4000 – 4056| 16 bits| Readout and write registers – configuration registers
4200 – 4261| 16 bits| Readout only registers with system parameter values
7500 – 7559| 32 bits (float)| Readout only registers with measuring and calculated values.
7600 – 7619| 32 bits (float)| Readout and write registers – registers with configuration data.
7000 – 7119| 16 bits| Readout only registers. Registers store the same data as the registers 7500-7559, where one value is stored in two successive registers.
7200 – 7239| 16 bits| Readout and write registers. Registers store the same data as the registers 7600-7614, where one value is stored in two successive registers.

5.5.4.1 Registers 3000 – 3127

Voltage harmonics
3000| 0…65535| % 100| Main voltage harmonic – value expressed as a percentage multiplied by 100.
3001| 0…65535| % 100| Second voltage harmonic
| 0…65535| % 100| Third voltage harmonic
:| :| :| :
3050| 0…65535| % 100| Fifty first voltage harmonic
3051…3063| | | Reserved
Current harmonic
3064| 0…65535| % 100| Main current harmonic – value expressed as a percentage multiplied by 100.
3065| 0…65535| % 100| Second current harmonic
| 0…65535| % 100| Third current harmonic
:| :| :| :
3114| 0…65535| % 100| Fifty first current harmonic
3115…3127| | | Reserved

5.5.4.2 Registers 4000 – 4054
16-bit readout and write configuration registers.

Measurement, display and protection of configuration
4000| 0…2| 0| Voltage measuring range
Value| Rated range (measuring range)
0| 100 V (120 V)
1| 230 V (280 V)
2| 400 V (480 V)
4001| 0, 1| 1| Current measurement range
Value| Rated range (measuring range)
0| 1 A (1.2 A)
1| 5 A (6 A)
4002| 0, 1| 0| Selection of the measurement synchronization
Value| Description
0| Synchronization of measurements with voltage
1| Synchronization of measurements with current
4003| 1…600| 10| Number of measurements to be averaged. The value specifies a multiple of 100 ms. The measurement after averaging is considered as a single (basic) measurement.
4004| 0, 1| 0| Method of calculating the measurements average value.
Value| Description
0| Moving window method.
1| Arithmetic mean – a standard method.
4005| 1…60| 15| Measuring values averaging period in minutes.
4006| 0, 1| 2| Averaging period synchronization with the real time clock. The parameter is applicable only if 60 minutes is a multiple of the averaging time.
---|---|---|---
Value| Format
0| Synchronization disabled
1| Synchronization enabled
4007| 0, 1| 0| Selection of the counter controlling the binary output (pulse).
Value| Description
0| Import energy counter
1| Export energy counter
4008| 0…27| 0| Selection of the main value displayed on the display.
Value| Description
0| Voltage measuring value.
1| Current measuring value.
2| Active power measuring value
3| Reactive power measuring value.
4| Apparent power measuring value
5| Power factor value (angle cosine of the power triangle).
6| Power tangent value.
7| Frequency of the measured signal.
8| Import energy counter.
9| Export energy counter.
10| Transferred import reactive energy counter.
11| Transferred export reactive energy counter.
12| Apparent energy counter.
13| Voltage mean value.
14| Current mean value.
15| Active power mean value.
16| Reactive power mean value.
17| Apparent power mean value.
18| Voltage minimum value in an averaging period.
19| Voltage maximum value in an averaging period.
20| Current minimum value in an averaging period.
21| Current maximum value in an averaging period.
22| Active power minimum value in an averaging period.
23| Active power maximum value in an averaging period.
24| Reactive power minimum value in an averaging period.
25| Reactive power maximum value in an averaging period.
26| Apparent power minimum value in an averaging period.
27| Apparent power maximum value in an averaging period.
4009| 0…6| 6| Displayed precision – position of the decimal point.
0| 000000
1| 00000.0
2| 0000.00
3| 000.000
4| 00.0000
| | | 5| 0.00000
---|---|---|---|---
6| Automatic – the position of the decimal point is set for maximum resolution.
4010| 0…29| 0| Contents of the bottom line of the display
Value| Description
0| Unit of main displayed value.
1| Voltage measuring value.
2| Current measuring value.
3| Active power measuring value
4| Reactive power measuring value.
5| Apparent power measuring value
6| Power factor value (angle cosine of the power triangle).
7| Power tangent value.
8| Frequency of the measured signal.
9| Import energy counter.
10| Export energy counter.
11| Import reactive energy counter.
12| Export reactive energy counter.
13| Apparent energy counter.
14| Voltage mean value.
15| Current mean value.
16| Active power mean value.
17| Reactive power mean value.
18| Apparent power mean value.
19| Voltage minimum value in an averaging period.
20| Voltage maximum value in an averaging period.
21| Current minimum value in an averaging period.
22| Current maximum value in an averaging period.
23| Active power minimum value in an averaging period.
24| Active power maximum value in an averaging period.
25| Reactive power minimum value in an averaging period.
26| Reactive power maximum value in an averaging period.
27| Apparent power minimum value in an averaging period.
28| Apparent power maximum value in an averaging period.
29| Current time
4011| 0…9999| 0| Access protection code to make changed in the configuration using the meter menu. It would be required to provide a code each time when entering the meter menu in case of entering a value higher than zero.
Analog output
4012| 0…5| 0| Analog output mode.
Value| Description
0| Output disabled.
1| Output in operating mode 4…20 mA.
2| Output in operating mode 0…20 mA.
3| Output in operating mode 0…10 V.
4| Current output controlled manually.
5| Voltage output controlled manually.
4013| 0…20| 0| Quantity controlling the analog output signal
---|---|---|---
Value| Description
0| Voltage measuring value.
1| Current measuring value.
2| Active power measuring value
3| Reactive power measuring value.
4| Apparent power measuring value
5| Power factor value (angle cosine of the power triangle).
6| Power tangent value.
7| Frequency of the measured signal.
8| Import energy counter.
9| Export energy counter.
10| Import reactive energy counter.
11| Export reactive energy counter.
12| Apparent energy counter.
13| Voltage mean value.
14| Current mean value.
15| Active power mean value.
16| Reactive power mean value.
17| Apparent power mean value.
18| Current time
RS-485
4014| 1…247| 1| RS–485 – MODBUS network meter address
4015| 0…3| 0| RS–485 – data transmission frame type (format)
Value| Frame type
0| 8N1
1| 8N2
2| 8O1
3| 8E1
4016| 0…8| 2| RS–485 – baud rate.
Value| Baud rate [b/s]
0| 2400
1| 4800
2| 9600
3| 14400
4| 19200
4017| 0, 1| 0| 5| 28800
6| 38400
7| 57600
8| 115200
RS–485 – Apply entered settings. Entering the value 1 changes immediately the settings and resets the register. If the RS-485 interface parameters have been modified without applying the change, new parameters will be applied after the meter is turned on again.
Alarm 1
4018| 0…20| 0| Value controlling the alarm. Significance of the settings as for the register 4013 (quantity controlling the analog output).
4019| 0…6| 5| Alarm type (see section 5.4.3)
---|---|---|---
| Value| Description
0| n-on
1| n-off
2| on
3| off
4| H-on – manually disabled
5| H-off – manually enabled
6| REG – state controlled by the RS-485 interface
4020| 0…900| 0| Alarm activation delay in seconds.
4021| 0…900| 0| Alarm deactivation delay in seconds.
4022| 0, 1| 0| Alarm activation memory. Entering the value 1 enables the function of the alarm event memory.
Alarm 2
4023| 0..20| 0| Value controlling the alarm, as for the alarm no. 1.
4024| 0…6| 5| Alarm type, as for the alarm no. 1.
4025| 0…900| 0| Alarm activation delay in seconds.
4026| 0…900| 0| Alarm deactivation delay in seconds.
4027| 0, 1| 0| Alarm activation memory. Entering the value 1 activates the alarm event memory function.
Alarm 3
4028| 0..20| 0| Value controlling the alarm, as for the alarm no. 1.
4029| 0…6| 5| Alarm type, as for the alarm no. 1.
4030| 0…900| 0| Alarm activation delay in seconds.
4031| 0…900| 0| Alarm deactivation delay in seconds.
4032| 0, 1| 0| Alarm activation memory. Entering the value 1 activates the alarm event memory function.
Alarm 4
4033| 0..20| 0| Value controlling the alarm, as for the alarm no. 1.
4034| 0…6| 5| Alarm type, as for the alarm no. 1.
4035| 0…900| 0| Alarm activation delay in seconds.
4036| 0…900| 0| Alarm deactivation delay in seconds.
4037| 0, 1| 0| Alarm activation memory. Entering the value 1 activates the alarm event memory function.
Clock – setting only. The registers store data of last entered time and date.
4038| 0..99| 19| Real-time clock – year – value to set the current year.
4039| 1…12| 8| Real-time clock – month – value to set the current month.
4040| 1…31| 1| Real-time clock – day – value to set the current day.
4041| 0…23| 12| Real-time clock – hours – value to set the current hours.
4042| 0…59| 0| Real-time clock – minutes – value to set the current minutes.
4043| 0…59| 0| Real-time clock – seconds – value to set the current seconds.
4044| 0, 1| 0| Automatic change of DST and inversely Entering the value 1 enables the function of automatic change of DST and inversely.
4045| 0, 1| 0| Apply entered time. Entering the value 1 sets the clock for the time and date defined in the registers 4038. 4043. The register is reset after applying the changes.
Alarms – Control

4046| 0, 1| 0| Alarm 1 – alarm state control for the active alarm in REG mode. Entering the value 1 activates the alarm. Entering the value 0 deactivates the alarm.
4047| 0, 1| 0| Alarm 2 – alarm state control for the active alarm in REG mode. Entering the value 1 activates the alarm. Entering the value 0 deactivates the alarm.
4048| 0, 1| 0| Alarm 3 – alarm state control for the active alarm in REG mode. Entering the value 1 activates the alarm. Entering the value 0 deactivates the alarm.
4049| 0, 1| 0| Alarm 4 – alarm state control for the active alarm in REG mode. Entering the value 1 activates the alarm. Entering the value 0 deactivates the alarm.
Alarms – Deleting alarm memory
4050| 0, 1| 0| Alarm 1 – delete alarm memory. Entering the value 1 deletes the alarm event memory.
4051| 0, 1| 0| Alarm 2 – delete alarm memory. Entering the value 1 deletes the alarm event memory.
4052| 0, 1| 0| Alarm 3 – delete alarm memory. Entering the value 1 deletes the alarm event memory.
4053| 0, 1| 0| Alarm 4 – delete alarm memory. Entering the value 1 deletes the alarm event memory.
Additional requests
4054| 0…65535| 0| Reset minimum / maximum of measuring value / measuring values. Reset request resets the minimum and maximum values, unless there is no measurement error. Then the reset will be completed after the error is cleared. The value from the register is retrieved and the register is cleared after the request is issued.

The register is treated as bits, with each bit corresponding to reset of a different value.

Bit| Description
0| Reset voltage minimum measured value.
1| Reset voltage maximum measured value.
2| Reset current minimum measured value.
3| Reset current maximum measured value.
4| Reset active power minimum measured value.
5| Reset active power minimum measured value.
6| Reset reactive power minimum measured value.
7| Reset reactive power maximum measured value.
8| Reset apparent power minimum measured value.
9| Reset apparent power maximum measured value.
10| Reset power ratio minimum value.
11| Reset power ratio maximum value.
12| Reset power tangent minimum value.
13| Reset power tangent maximum value.
14| Reset frequency minimum measured value.
15| Reset frequency maximum measured value.
4055| 0…65535| 0| Reset minimum / maximum of measuring value / measuring values – continued.
| | | Bit| Description
---|---|---|---|---
0| Reset/set active import energy counter.
1| Reset/set active export energy counter.
2| Reset/set reactive import energy counter.
3| Reset/set reactive export energy counter.
4| Reset apparent energy counter.
4056| 0, 1| 0| Restore default settings Entering 1 restores the default settings (default configuration) and resets this register.

5.5.4.3 Registers 4200 – 4261
Readout only 16-bit registers.

System parameters
4200| Device ID
4201| Software version – version number multiplied by the value 100.
4202| N32 meter type – code corresponding to the “P” character.
4203| Meter serial number – older 16 bits.
4204| Meter serial number – younger 16 bits.
4205| Meter calibration date – older 16 bits.
4206| Meter calibration date – younger 16 bits.
4207| Total meter operation time in seconds – older 16 bits.
4208| Total meter operation time in seconds – younger 16 bits.
Real Time Clock
4209| Current date – year in YY format.
4210| Current date – month.
4211| Current date – day.
4212| Current time – hour.
4213| Current time – minutes.
4214| Current time – seconds.
4215| State of the internal time clock
Value| Description
0| No clock errors.
1| Lost time settings.
2| Clock initialization error – faulty clock.
3| Clock setting error.
Alarms – alarm event memory
4216| Alarm 1: Value 1 – active mode to register the alarm event. Value zero – no alarm events registered.
4217| Alarm 2: Value 1 – active mode to register the alarm event. Value zero – no alarm events registered.
4218| Alarm 3: Value 1 – active mode to register the alarm event. Value zero – no alarm events registered.
4219| Alarm 4: Value 1 – active mode to register the alarm event. Value zero – no alarm events registered.
Active import energy counter in Ws – 64-bit
4220| The registers store 64-bit content of active import energy counter in Ws (Watt seconds), the register 4220 stores the highest 16-bit of the word and the register 4223 stores the lowest 16-bit of the word.
4221
4222
4223
Active export energy counter in Ws – 64-bit

4224| The registers store 64-bit content of active export energy counter in Ws (Watt seconds), the register 4224 stores the highest 16-bit of the word and the register 4227 stores the lowest 16-bit of the word.
4225
4226
4227
Reactive import energy counter in vars – 64-bit
4228| The registers store 64-bit content of reactive import energy counter in Ws (var seconds), the register 4228 stores the highest 16-bit of the word and the register 4231 stores the lowest 16-bit of the word.
4229
4230
4231
Reactive export energy counter in vars – 64-bit
4232| The registers store 64-bit content of reactive export energy counter in Ws (var seconds), the register 4232 stores the highest 16-bit of the word and the register 4235 stores the lowest 16-bit of the word.
4233
4234
4235
Reactive energy counter in VAs – 64-bit
4236| The registers store 64-bit content of apparent energy counter in VAs (volt-ampere seconds), the register 4236 stores the highest 16-bit of the word and the register 4239 stores the lowest 16-bit of the word.
4237
4238
4239
Reserved
4240|

Reserved registers.

4241
Status bits – value 1 indicates the occurrence of a given event
4242| Communication error with the internal data memory.
4243| Corrupted configuration registers from register group 4000.
4244| Corrupted configuration registers from register group 7600.
4245| Corrupted calibration registers – no calibration.
4246| The meter is not calibrated.
4247| Archive memory error.
4248| Communication error with the analog output module.
4249| Measurement module error.
4250| Communication error with A/D converter.
4251| Voltage range exceeded.
4252| Current range exceeded.
4253| Voltage measuring value below the lower measuring threshold.
4254| Current measuring value below the lower measuring threshold.
4255| Power range (voltage or current) exceeded.
4256| No signal from zero crossing detector – low signal level in the detector input loop.
4257| Loss time – not set RTC clock.
4258| Alarm 1 active.
4259| Alarm 2 active.
4260| Alarm 3 active.
4261| Alarm 4 active.

5.5.4.4 Registers 7500 – 7559 and 7000 – 7119
The 32-bit and the corresponding 16-bit registers with measuring and calculated data. The address entered in the address field is for 32-bit float variables or in the second column for the values stored in two 16-bit registers, where the value stored in two registers is of float type.

Address (32- bit float registers)| Address (value in 2 16-bit registers)| Description
---|---|---
7500| 7000| Device ID
7501| 7002| Voltage measuring value in [V]
7502| 7004| Current measuring value in [A]
7503| 7006| Active power measuring value in [W]
7504| 7008| Reactive power measuring value in [W]
7505| 7010| Apparent power measuring value in [VA]
7506| 7012| Power factor – cosj calculated based on the power triangle
7507| 7014| Power angle tangent – tanj calculated based on the power triangle
7508| 7016| Measuring signal frequency [Hz]
7509| 7018| Active import energy [kWh]
7510| 7020| Active export energy [kWh]
7511| 7022| Import reactive energy [kvarh]
7512| 7024| Export reactive energy [kvarh]
7513| 7026| Total apparent energy [kVAh]
7514| 7028| Harmonic distortion factor of voltage (THD) [%]
7515| 7030| Harmonic distortion factor of current (THD) [%]
7516| 7032| Voltage mean value [V]
7517| 7034| Current mean value [A]
7518| 7036| Active power mean value [W]
7519| 7038| Reactive power mean value [var]
7520| 7040| Apparent power mean value [VA]
7521| 7042| Registered voltage minimum value [V]
7522| 7044| Registered voltage maximum value [V]
7523| 7046| Registered current minimum value [A]
7524| 7048| Registered current maximum value [A]
7525| 7050| Registered active power minimum value [W]
7526| 7052| Registered active power maximum value [W]
7527| 7054| Registered reactive power minimum value [var]
7528| 7056| Registered reactive power maximum value [var]
7529| 7058| Registered active power minimum value [VA]
7530| 7060| Registered active power maximum value [VA]
7531| 7062| Registered power factor minimum value (cosj)
---|---|---
7532| 7064| Registered power factor maximum value (cosj)
7533| 7066| Registered power tangent minimum value (tanj)
7534| 7068| Registered power tangent maximum value (tanj)
7535| 7070| Registered signal frequency minimum measuring value [Hz]
7536| 7072| Registered signal frequency maximum measuring value [Hz]
7537| 7074| Voltage minimum value in current averaging period [V]
7538| 7076| Voltage maximum value in current averaging period [V]
7539| 7078| Current minimum value in current averaging period [A]
7540| 7080| Current maximum value in current averaging period [A]
7541| 7082| Active power minimum value in current averaging period [W]
7542| 7084| Active power maximum value in current averaging period [W]
7543| 7086| Reactive power minimum value in current averaging period [var]
7544| 7088| Reactive power maximum value in current averaging period [var]
7545| 7090| Apparent power minimum value in current averaging period [VA]
7546| 7092| Apparent power maximum value in current averaging period [VA]
7547| 7094| Reserved
7548| 7096| Reserved
7549| 7098| Reserved
7550| 7100| Reserved
7551| 7102| Reserved
7552| 7104| Reserved
7553| 7106| Reserved
7554| 7108| Reserved
7555| 7110| Reserved
7556| 7112| Reserved
7557| 7114| Reserved
7558| 7116| Voltage of the backup battery.
7559| 7118| CPU temperature.
7560| 7120| Current time in the form of hh.mmss.

5.5.4.5    Registers 7600 – 7677 and 7200 – 7355
The 32-bit and the corresponding 16-bit registers with the configuration parameters.

Address (32- bit float registers)| Address (value in 2 16- bit registers)| Permissible values| Default| Description
---|---|---|---|---
Ratio – transformers configuration
7600| 7200| 0…200,000| 100| Voltage transformer – primary voltage
7601| 7202| 0…200,000| 100| Voltage transformer – secondary voltage
7602| 7204| 0…200,000| 5| Current transformer – primary current
7603| 7206| 0…200,000| 5| Current transformer – secondary current
Minimum and maximum displayed value
7604| 7208| -99999M…999999M| -99999| Display narrowing lower threshold. If the value to be displayed is below the threshold, the lower limit symbol is displayed.
7605| 7210| -99999M…999999M| 999999| Display narrowing upper threshold. If the value to be displayed is above the threshold, the upper limit symbol is displayed.
---|---|---|---|---
Reactive energy
7606| 7212| -99999M…999999M| 0| Import active energy value to be written to the energy counter when resetting the energy counter.
7607| 7214| -99999M…999999M| 0| The value of exported active energy value to be written to the energy counter when resetting the energy counter.
7608| 7216| 0.001…999999| 1| Pulse weight at the energy output (energy equivalent)
Analog output
7609| 7218| -99999M…999999M| 0| The quantity of the value controlling the analog output for which the output will have the minimum value (according to the output range).
7610| 7220| -99999M…999999M| 100| The quantity of the value controlling the analog output for which the output will have the maximum value (according to the output range).
7611| 7222| 0…22| 0| The value of the analog output signal for manual operation or during a measurement error at the input.
Alarms – alarm state change thresholds
7612| 7224| -99999M…999999M| 10| Alarm 1 – alarm state change lower threshold.
7613| 7226| -99999M…999999M| 20| Alarm 1 – alarm state change upper threshold.
7614| 7228| -99999M…999999M| 10| Alarm 2 – alarm state change lower threshold.
7615| 7230| -99999M…999999M| 20| Alarm 2 – alarm state change upper threshold.
7616| 7232| -99999M…999999M| 10| Alarm 3 – alarm state change lower threshold.
7617| 7234| -99999M…999999M| 20| Alarm 3 – alarm state change upper threshold.
7618| 7236| -99999M…999999M| 10| Alarm 4 – alarm state change lower threshold.
7619| 7238| -99999M…999999M| 20| Alarm 4 – alarm state change upper threshold.

Error codes

The N32P meters have several diagnostic functions and settings built-in that allow to limit the displaying. So the display may show and the status registers may store information about the diagnosed error, event or fault. Possible messages and their potential causes are listed below.

– the measurement result does not fit on the display. Lower the display resolution or
select the mode of automatic position of the decimal point.
| Lost calibration. Please contact the technical support.
| Lost real time clock settings. The message is displayed only when turning the meter on. Time and date must be set. If the message still appears when turning
the meter on after setting the time and date, please contact the Service Department because a backup battery may require to be replaced. This message can be ignored if the clock settings are not significant in a given application.
| Measurement module error. It is not possible to make a measurement, please contact the technical support.
| Configuration data memory and calibration memory error. It is not possible to use a meter, please contact the technical support.
| No communication with the analog output module. Please contact the Service Department.

Technical data

Measuring ranges

Current measuring loop
Current 1 A| 0.05    1.2 A
Current 5 A| 0.05…6 A
Power measurement
Active power| Actual measuring range for active and reactive power:
-1.2Ur 1.2Ir… 1.2Ur 1.2Ir,
Apparent power:
0…. 1.2Ur * 1.2Ir
where:
Ur – set voltage measuring range;
Ir – set current measuring range;| 0.2
Reactive power| 0.2
** Apparent power| 0.2
Other measuring parameters**
Power factor (cosj)| -1…0…1| 0.5
Power angle tangent| -999.99… -1.2…0…1.2 …999.99| 0.5
Active energy| 0    9 999 999.9 kWh| 0.5
Reactive energy| 0   9 999 999.9 kvarh| 0.5
Currents and voltages THD| 0…100%| 1
Current and voltage harmonics| 0…100%| 1
Frequency| 35…65…100| 0.1
Current time| 00.00…23.59| ±20 ppm

KU – voltage ratio; KI – current ratio

• – parameters calculated based on the power triangle. Meter accuracy class depends on the accuracy of the active and apparent power measurement. The reactive power is also calculated based on the power triangle.
  Measuring loops parameters

Current measurement using an internal current transformer – test loop resistance| < 0.1 Ω
Short-term overload (5s)
–  voltage inputs
–  5 A current input
–  Current input 1 A
where Un – rated voltage; In rated current| 2 Un
10 In
50 In

Additional measurement errors

RS485 interface

Alarm outputs:

• NO relay: 5 A / 250 V AC; 5 A / 30 V DC (listed current values are the maximum permissible values. Operation at maximum load significantly shortens lifespan of the relay).
• Three relays with a switching contact (option): 6 A / 250 V AC; 6 A / 30 V DC; 0.15 A / 250 V DC. Maximum switching current 10 A / 20 ms.

Analog output

Voltage output

Rated range| 0…10 V
Maximum output voltage| < 15 V
Minimum load resistance| 500 Ω
Intrinsic error| 0.1 % of range
Error due to temperature change| 50% of intrinsic error value / 10 K
Current output
Rated range| 0…20 mA; 4…20 mA
Maximum output voltage| < 15 V
Maximum load resistance| 500 Ω
Maximum current value| 24 mA
Intrinsic error| 0.1% of range
Error due to temperature change| 50% of intrinsic error value / 10 K

Rated operating conditions

Supply voltage (depends on the version)| 85…253 V AC (40…400 Hz), 90…300 V DC
or
20…40 V AC (40…400 Hz), 20…60 V DC
---|---
Power consumption| < 6 VA
Working temperature| -20… 23 …+55 ºC
Storage temperature| -30…70 ºC
Humidity| <95 % (no condensation)
Working position| any
Pre-heating time| 15 minutes

Protection grade ensured

Weight and dimensions

Electromagnetic compatibility

Safety requirements acc. to EN 61010-1

300 V for the circuits: supply, alarm.
50 V for the circuits: auxiliary supply, RS-485 interface, analog output
Altitude a.s.l.| < 2000 m

Ordering code

• only after agreeing with a manufacturer.

LUMEL S.A.
ul. Słubicka 4, 65-127 Zielona Góra, POLAND
tel. 68 45 75 100
www.lumel.com.pl
Technical support:
tel.: (+48 68) 45 75 143, 45 75 141, 45 75 144, 45 75 140
e-mail:export@lumel.com.pl
Export department:
tel.: (+48 68) 45 75 130, 45 75 131, 45 75 132
e-mail:export@lumel.com.pl
Calibration & Attestation:
e-mail:laboratorium@lumel.com.pl
N32P-09

Documents / Resources

| LUMEL N32P-09 Digital Panel Meter [pdf] User Manual
N32P-09 Digital Panel Meter, N32P-09, Digital Panel Meter, Panel Meter, Meter
---|---

References

• Lumel | Automation devices and systems | SMT/THT assembly | Lumel

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