itsensor N1040 Temperature Sensor Controller Instruction Manual

itsensor N1040 Temperature Sensor Controller

SAFETY ALERTS

The symbols below are used on the equipment and throughout this document to draw the user’s attention to important operational and safety information.

CAUTION: Read the manual thoroughly before installing and operating the equipment.

CAUTION OR DANGER: Electrical shock hazard

All safety related instructions that appear in the manual must be observed to ensure personal safety and to prevent damage to either the instrument or the system. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

INSTALLATION / CONNECTIONS

The controller must be fastened on a panel, following the sequence of steps described below:

• Prepare a panel cut-out according Specifications;
• Remove the mounting clamps from the controller;
• Insert the controller into the panel cut-out;
• Slide the mounting clamp from the rear to a firm grip at the panel.

ELECTRICAL CONNECTIONS
Fig. 01 below shows the electrical terminals of the controller:

RECOMMENDATIONS FOR THE INSTALLATION

• All electrical connections are made to the screw terminals at the rear of the controller.
• To minimize the pick-up of electrical noise, the low voltage DC connections and the sensor input wiring should be routed away from high-current power conductors.
• If this is impractical, use shielded cables. In general, keep cable lengths to a minimum. All electronic instruments must be powered by a clean mains supply, proper for instrumentation.
• It is strongly recommended to apply RC’S FILTERS (noise suppressor) to contactor coils, solenoids, etc. In any application, it is essential to consider what can happen when any part of the system fails. The controller features by themselves cannot assure total protection.

FEATURES

INPUT TYPE SELECTION

Table 01 shows the sensor types accepted and their respective codes and ranges. Access the parameter TYPE in the INPUT cycle to select the appropriate sensor.

OUTPUTS
The controller offers two, three or four output channels, depending on the loaded optional features. The output channels are user configurable as Control Output, Alarm 1 Output, Alarm 2 Output, Alarm 1 OR Alarm 2 Output and LBD (Loop Break Detect) Output.

OUT1 – Pulse type output of electrical voltage. 5 Vdc / 50 mA max.
Available on terminals 4 and 5

OUT2 – Relay SPST-NA. Available at terminals 6 and 7.

OUT3 – Relay SPST-NA. Available at terminals 13 and 14.

OUT4 – Relay SPDT, available at terminals 10, 11 and 12.

CONTROL OUTPUT
The control strategy can be ON/OFF (when PB = 0.0) or PID. The PID parameters can be automatically determined enabling the auto-tuning function (ATvN).

ALARM OUTPUT
The controller contains 2 alarms that can be directed (assigned) to any output channel. The alarm functions are described in Table 02.

Note: Alarm functions on Table 02 are also valid for Alarm 2 (SPA2).

Important note: Alarms configured with the ki, dif and difk functions also trigger their associated output when a sensor fault is identified and signaled by the controller. A relay output, for example, configured to act as a High Alarm (ki), will operate when the SPAL value is exceeded and also when the sensor connected to the controller input is broken.

INITIAL BLOCKING OF ALARM

The initial blocking option inhibits the alarm from being recognized if an alarm condition is present when the controller is first energized. The alarm will be enabled only after the occurrence of a non-alarm condition. The initial blocking is useful, for example, when one of the alarms is configured as a minimum value alarm, causing the activation of the alarm soon upon the process start-up, an occurrence that may be undesirable. The initial blocking is disabled for the sensor break alarm function ierr (Open sensor).

SAFE OUTPUT VALUE WITH SENSOR FAILURE
A function that places the control output in a safe condition for the process when is identified an error in the sensor input. With a fault identified in the sensor, the controller determines the percentage value defined in parameter 1E.ov for the control output. The controller will remain in this condition until the sensor failure disappears. 1E.ov values are only 0 and 100 % when in ON/OFF control mode. For PID control mode, any value in the range from 0 to 100 % is accepted.

LBD FUNCTION – LOOP BREAK DETECTION
The LBD.t parameter defines a time interval, in minutes, within which the PV is expected to react to a control output signal. If the PV does not react properly within the time interval configured, the controller signals in its display the occurrence of the LBD event, which indicates problems in the control loop.
The LBD event can also be sent to one of the output channels of the controller. To do this, simply configure the desired output channel with the LDB function which, in the event of this event, is triggered. This function is disabled with a value of 0 (zero). This function allows the user to detect problems in the installation, such as defective actuators, power supply failures, etc.

OFFSET
A feature that allows the user to make small adjustments in the PV indication. Allows correcting measurement errors that appear, for example, when replacing the temperature sensor.

USB INTERFACE

The USB interface is used to CONFIGURE, MONITOR or UPDATE the controller FIRMWARE. The user should use QuickTune software, which offers features to create, view, save and open settings from the device or files on the computer. The tool for saving and opening configurations in files allows the user to transfer settings between devices and perform backup copies. For specific models, QuickTune allows updating the firmware (internal software) of the controller via the USB interface. For MONITORING purposes, the user can use any supervisory software (SCADA) or laboratory software that supports the MODBUS RTU communication over a serial communication port. When connected to a computer’s USB, the controller is recognized as a conventional serial port (COM x). The user must use QuickTune software or consult the DEVICE MANAGER on the Windows Control Panel to identify the COM port assigned to the controller. The user should consult the mapping of the MODBUS memory in the controller’s communication manual and the documentation of the supervision software to start the MONITORING process. Follow the procedure below to use the USB communication of the device:

1. Download QuickTime software from our website and install it on the computer. The USB drivers necessary for operating the communication will be installed with the software.
2. Connect the USB cable between the device and the computer. The controller does not have to be connected to a power supply. The USB will provide enough power to operate the communication (other device functions may not operate).
3. Run the QuickTune software, configure the communication and start the device recognition.

The USB interface IS NOT SEPARATE from the signal input (PV) or the controller’s digital inputs and outputs. It is intended for temporary use during CONFIGURATION and MONITORING periods. For the safety of people and equipment, it must only be used when the piece of equipment is completely disconnected from the input/output signals. Using the USB in any other type of connection is possible but requires a careful analysis by the person responsible for installing it. When MONITORING for long periods of time and with connected inputs and outputs, we recommend using the RS485 interface.

OPERATION

The controller’s front panel, with its parts, can be seen in the Fig. 02:

Fig. 02 – Identification of the parts referring to the front panel

Display: Displays the measured variable, symbols of the configuration parameters and their respective values/conditions.

COM Indicator: Flashes to indicate communication activity in the RS485 interface.

TUNE Indicator: Stays ON while the controller is in the tuning process. OUT Indicator: For relay or pulse control output; it reflects the actual state of the output.

A1 and A2 Indicators: Signalize the occurrence of an alarm situation.

P Key: Used to walk through the menu parameters.

Increment key and Decrement key: Allow altering the  values of the parameters.

B ack key: Used to retrocede parameters.

STARTUP
When the controller is powered up, it displays its firmware version for 3 seconds, after which the controller starts normal operation. The value of PV and SP is then displayed and the outputs are enabled. In order for the controller to operate properly in a process, its parameters need to be configured first, such that it can perform accordingly to the system requirements. The user must be aware of the importance of each parameter and for each one determine a valid condition. The parameters are grouped in levels according to their functionality and operation easiness. The 5 levels of parameters are: 1 – Operation / 2 – Tuning / 3 – Alarms / 4 – Input / 5 – Calibration The “P” key is used for accessing the parameters within a level. Keeping the “P” key pressed, at every 2 seconds the controller jumps to the next level of parameters, showing the first parameter of each level: PV >> atvn >> fva1 >> type >> pass >> PV … To enter a particular level, simply release the “P” key when the first parameter in that level is displayed. To walk through the parameters in a level, press the “P” key with short strokes. To go back to the previous parameter in a cycle, press : Each parameter is displayed with its prompt in the upper display and value/condition in the lower display. Depending on the level of parameter protection adopted, the parameter PASS precedes the first parameter in the level where the protection becomes active. See section Configuration Protection.

DESCRIPTION OF THE PARAMETERS

OPERATION CYCLE

TUNING CYCLE

ALARMS CYCLE

INPUT CYCLE

CALIBRATION CYCLE
All types of input are calibrated in the factory. In case a recalibration is required; it shall be carried out by a specialized professional. In case this cycle is accidentally accessed, do not perform alteration in its parameters.

CONFIGURATION PROTECTION

The controller provides means for protecting the parameters configurations, not allowing modifications to the values of the parameters, and avoiding tampering or improper manipulation. The parameter Protection (PROt), in the Calibration level, determines the protection strategy, limiting the access to particular levels, as shown by the Table 04.

ACCESS PASSWORD
The protected levels, when accessed, request the user to provide the Access Password for granting permission to change the configuration of the parameters on these levels. The prompt PASS precedes the parameters on the protected levels. If no password is entered, the parameters of the protected levels can only be visualized. The Access Password is defined by the user in the parameter Password Change (PAS.(), present in the Calibration Level. The factory default for the password code is 1111.

PROTECTION ACCESS PASSWORD
The protection system built into the controller blocks for 10 minutes the access to protected parameters after 5 consecutive frustrated attempts of guessing the correct password.

MASTER PASSWORD
The Master Password is intended for allowing the user to define a new password in the event of it being forgotten. The Master Password doesn’t grant access to all parameters, only to the Password Change parameter (PAS(). After defining the new password, the protected parameters may be accessed (and modified) using this new password. The master password is made up by the last three digits of the serial number of the controller added to the number 9000. As an example, for the equipment with serial number 07154321, the master password is 9 3 2 1.

DETERMINATION OF PID PARAMETERS

During the process of determining automatically the PID parameters, the system is controlled in ON/OFF in the programmed Setpoint. The auto-tuning process may take several minutes to be completed, depending on the system. The steps for executing the PID auto-tuning are:

• Select the process Setpoint.
• Enable auto-tuning at the parameter “Atvn”, selecting FAST or FULL.

The option FAST performs the tuning in the minimum possible time, while the option FULL gives priority to accuracy over speed. The sign TUNE remains lit during the whole tuning phase. The user must wait for the tuning to be completed before using the controller. During the auto-tuning period the controller will impose oscillations to the process. PV will oscillate around the programmed set point and controller output will switch on and off many times. If the tuning does not result in satisfactory control, refer to Table 05 for guidelines on how to correct the behavior of the process.

Table 05 – Guidance for manual adjustment of the PID parameters

MAINTENANCE

PROBLEMS WITH THE CONTROLLER
Connection errors and inadequate programming are the most common errors found during the controller operation. A final revision may avoid loss of time and damages. The controller displays some messages to help the user identify problems.

Other error messages may indicate hardware problems requiring maintenance service.

CALIBRATION OF THE INPUT
All inputs are factory calibrated and recalibration should only be done by qualified personnel. If you are not familiar with these procedures do not attempt to calibrate this instrument. The calibration steps are:

• Configure the input type to be calibrated in the type parameter.

• Configure the lower and upper limits of indication for the maximum span of the selected input type.

• Go to the Calibration Level.

• Enter the access password.

• Enable calibration by setting YES in (alib parameter.

• Using an electrical signals simulator, apply a signal a little higher than the low indication limit for the selected input.

• Access the parameter “inLC”. With the keys and adjust the display reading such as to match the applied signal. Then press the P key.

• Apply a signal that corresponds to a value a little lower than the upper limit of indication.
  Access the parameter “inLC”. With the keys and adjust the display reading such as to match the applied signal.

• Return to the Operation Level.

• Check the resulting accuracy. If not good enough, repeat the procedure.

Note: When checking the controller calibration with a Pt100 simulator, pay attention to the simulator minimum excitation current requirement, which may not be compatible with the 0.170 mA excitation current provided by the controller.

SERIAL COMMUNICATION

The controller can be supplied with an asynchronous RS-485 digital communication interface for a master-slave connection to a host computer (master). The controller works as a slave only and all commands are started by the computer which sends a request to the slave address. The addressed unit sends back the requested reply. Broadcast commands (addressed to all indicator units in a multidrop network) are accepted but no reply is sent back in this case.

CHARACTERISTICS

• Signals compatible with RS-485 standard. MODBUS (RTU) Protocol. Two wire connections between 1 master and up to 31 (addressing up to 247 possible) instruments in bus topology.
• Communication signals are electrically isolated from the INPUT and POWER terminals. Not isolated from the retransmission circuit and the auxiliary voltage source when available.
• Maximum connection distance: 1000 meters.
• Time of disconnection: Maximum 2 ms after last byte.
• Programmable baud rate: 1200 to 115200 bps.
• Data Bits: 8.
• Parity: Even, Odd or None.
• Stop bits: 1
  • Time at the beginning of response transmission: maximum 100 ms after receiving the command. The RS-485 signals are:

CONFIGURATION OF PARAMETERS FOR SERIAL COMMUNICATION
Two parameters must be configured for using the serial type: bavd: Communication speed.

Prty: Parity of the communication.

addr: Communication address for the controller.
REDUCED REGISTERS TABLE FOR SERIAL COMMUNICATION

Communication Protocol
The MOSBUS RTU slave is implemented. All configurable parameters can be accessed for reading or writing through the communication port. Broadcast commands are supported as well (address 0).
The available Modbus commands are:

• 03 – Read Holding Register
• 06 – Preset Single Register
• 05 – Force Single Coil

Holding Registers Table
Follows a description of the usual communication registers. For full documentation download the Registers Table for Serial Communication in the N1040 section of our website – www.novusautomation.com. All registers are 16 bit signed integers.

IDENTIFICATION

• A: Outputs Features
  • PR: OUT1= Pulse / OUT2= Relay
  • PRR: OUT1= Pulse / OUT2=OUT3= Relay
  • PRRR: OUT1= Pulse / OUT2=OUT3= OUT4= Relay
• B: Digital Communication
• 485: Available RS485 digital communication
• C: Power Supply electric
  • (Blank): 100~240 Vac / 48~240 Vdc; 50~60 Hz
  • 24V: 12~24 Vdc / 24 Vac

SPECIFICATIONS

DIMENSIONS: …………………………………… 48 x 48 x 80 mm (1/16 DIN)
Cut-out in the panel: ………………… 45.5 x 45.5 mm (+0.5 -0.0 mm)
Approximate Weight: ………………………………………………………75 g

POWER SUPPLY:
Model standard: ………………….. 100 to 240 Vac (±10 %), 50/60 Hz
…………………………………………………………. 48 to 240 Vdc (±10 %)
Model 24 V: …………………. 12 to 24 Vdc / 24 Vac (-10 % / +20 %)
Maximum consumption: ……………………………………………….. 6 VA

ENVIRONMENTAL CONDITIONS
Operation Temperature: ……………………………………….. 0 to 50 °C
Relative Humidity: …………………………………………… 80 % @ 30 °C
For temperatures above 30 °C, reduce 3 % for each °C
Internal use; Category of installation II, Degree of pollution 2;
altitude < 2000 meters

INPUT …… Thermocouples J; K; T and Pt100 (according of Table 01)
Internal Resolution:……………………………….. 32767 levels (15 bits)
Resolution of Display: ……… 12000 levels (from -1999 up to 9999)
Rate of Input Reading: ……………………………. up 10 per second (*)
Accuracy: . Thermocouples J, K, T: 0,25 % of the span ±1 °C (*)
………………………………………………………. Pt100: 0,2 % of the span
Input Impedance: ……………… Pt100 and thermocouples: > 10 MΩ
Measurement of Pt100: ……………………. 3-wire type, (α=0.00385)
With compensation for cable length, excitation current of 0.170 mA. () Value is adopted when the Digital Filter parameter is set to 0 (zero) value. For Digital Filter values other than 0, the Input Reading Rate value is 5 samples per second. (**) the use of thermocouples requires a minimum time interval of 15 minutes for stabilization.

OUTPUTS:

• OUT1: ………………………………….. Voltage pulse, 5 V / 50 mA max.
• OUT2: ………………………….. Relay SPST; 1.5 A / 240 Vac / 30 Vdc
• OUT3: ………………………….. Relay SPST; 1.5 A / 240 Vac / 30 Vdc
• OUT4: …………………………….. Relay SPDT; 3 A / 240 Vac / 30 Vdc
  FRONT PANEL: ……………………. IP65, Polycarbonate (PC) UL94 V-2
  ENCLOSURE: ………………………………………. IP20, ABS+PC UL94 V-0
  ELECTROMAGNETIC COMPATIBILITY: …………… EN 61326-1:1997 and EN 61326-1/A1:1998
  EMISSION: …………………………………………………… CISPR11/EN55011
  IMMUNITY: …………………. EN61000-4-2, EN61000-4-3, EN61000-4-4,
  EN61000-4-5, EN61000-4-6, EN61000-4-8 and EN61000-4-11
  SAFETY: …………………….. EN61010-1:1993 and EN61010-1/A2:1995

SPECIFIC CONNECTIONS FOR TYPE FORK TERMINALS;
PROGRAMMABLE CYCLE OF PWM: From 0.5 up to 100 seconds. STARTS UP OPERATION: After 3 seconds connected to the power supply. CERTIFICATION: and .

WARRANTY

Warranty conditions are available on our website www.novusautomation.com/warranty.

References

• NOVUS Automation Inc. - Controllers, Thermostats, Data Loggers, Solid State Relays, Sensors, Transmitters, SCADA, Data Acquisition and Temperature Controllers

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