SOLAX POWER DDSU666 Single Phase Smart Meter Instruction Manual

DDSU666 Single Phase Smart Meter
Instruction Manual

DDSU666 Single Phase Smart Meter

DDSU666 Single phase Smart Meter
Operation Manual
ZTY0.464.1224

Brief Introduction

1.1 Main application & applicable range
Type DDSU666 single phase smart meter (hereinafter referred to as the “instrument”) is designed based on power monitoring and energy metering demands for electric power system, communication industry, construction industry, etc.  as a new generation of intelligent instrument combining measurement and communication function, mainly applied into the measurement and display for the electric parameters in the electric circuit including voltage, current, power,  frequency, power factor, active energy, etc. The network can be realized through RS485 communication interface and external device. Adopting the standard DIN35mm din rail mounting and modular design, it is characterized with small  volume, easy installation and easy networking, widely applied into the internal energy monitoring and assessment for industrial and mining enterprises, hotels, schools, large public buildings.
The meter is intended to be installed in a Mechanical Environment ‘M1’, with Shock and Vibrations of low significance, as per 2014/32/EU Directive.
The meter is intended to be installed in Electromagnetic Environment ‘E2’, as per 2014/32/EU
Directive.
Complied standards:
EN 50470-1-2007《Electricity metering equipment (a.c.) – Part 1: General requirements, tests and test conditions – Metering equipment (class indexes A, B and C) 》；
EN 50470-3-2007《Electricity metering equipment (a.c.) – Part 3: Particular requirements – Static meters for active energy (class indexes A, B and C) 》；
Welbeck 7.2-2018 Welbeck, European cooperation in legal metrology software guide MODUS-RTU protocol.
1.2 Product Features

1. Metering the positive and negative active power;
2. Adopting wide LCD, it has clear vision.
3. RS485 communication function with communication protocol complied with Modbus-RTU；
4. Adopting DIN35mm standard din rail mounting, structural modular design, it is characterized with small volume, easy installation and easy networking.
   1.3 Model composition and meanings

1.4 Applicable environmental condition.
Operating temperature range: -25℃～+55℃；
Relative humidity(Annually average): ＜75% non-condensing；
Atmospheric pressure: 63.0kPa～106.0kPa( altitude 4km and below), excepting the requirements for special orders.

Working Principle

The working principle block diagram of the instrument is shown in figure 2:

Main Technical Performance & Parameters

3.1 Model specification

Table 1 Model specification

Model| Accuracy class| Frequency| Reference voltage| Current specification| Instrument constant| Type
---|---|---|---|---|---|---
DDSU666| Active Class B| 60Hz| 230 V| 0.25-5(80)A| 800imp/kWh| Direct connection
DDSU666-CT| Active Class C| 60Hz| 230 V| 0.015-1.5(6)A| 6400imp/kWh| Via transformer

Note1：0.015-1.5(6)A is Connection through current transformers, starting current is 0.015A;
Note1：0.25-5(80)A is direct access, starting current is 0.02A;
3.2Percentage error
Table 2 Percentage error of single phase energy meter not exceeding the below corresponding limited value

Type| Current range| Power factor| Percentage error limit of each class instrument（%）
---|---|---|---
Class B| Class C
Via CT| Imin≤I＜In| 1| –| ±1.0
1In≤I≤Imax| 0.5L、1、0.8C| –| ±0.5
Direct connection| Imin≤I＜Ib| 1| ±1.5| –
Ib≤I≤Imax| 0.5L、1、0.8C| ±1.0| –
remark| In：secondary rated current of CT; Ib：calibrated current of the energy meters;
Imin : Minimum current ;      L:inductive；  C：capacitive

3.3 Start
Table 3 Under the referenced voltage and table 4, the energy meter can be started and continuously measure the energy

3.4 Deflection
The electric energy meter should have good antireflection logic. When the voltage loop with 1.15 times of referenced voltage and the current loop is disconnected, the energy will not produce more than one pulse.
3.5 Electrical parameters
Table 4 Electrical parameters

3.6 Other technical parameters
Table 5 Other technical parameters

Measuring range| 0～999999.99 kWh（only display 6 bit,，automatic shift of decimal point）
---|---
Display mode| LCD display
Communication protocol| Modbus-RTU protocol

3.7 Adoption for key components
Table 6 Adoption for key components

1.5（6）A:ZTY8.067.2729V2、ZTY8.067.2731V2、ZTY8.067.2732V2
5（80）A : ZTY8.067.2729V2、ZTY8.067.2730V2
（Note: the actual plate number is determined according to the actual sample table）ZTY6.176.301

Main functions

4.1 Metering function

1. Accurately metering the positive and negative active power;
2. The storage data of the electric energy meter will not lost after powering off.
   4.2 Displayed functions
   When the energy meter is in normal working condition (on load state), the positive pulse indicator should be flashed. If long time for no flashing or light for the indicator, please check whether the wiring mode of the energy meter is right or not.。

power
var| The unit of the reactive power, the display data of indicating LCD is reactive power
Hz| The unit of the frequency, the display data of indicating LCD is frequency
kWh| The unit of the active energy, the display data of indicating LCD is active energy

The display time of the measurement data is five seconds and information sample for every page of the measured information of measurement data (if not consistent with the instrument panel, please take the object as standard.)
Light time of the background: 1 min.
Table 8 Display Instruction

U=220.0V。
| Means the current display current is I, the unit is “A”, the left picture is I=5.000A.
| Means the current display is the active power P，the unit is “kW”，the left picture is P=1.100kW.
| Means the current display is the power factor Ft，the left picture is Ft=1.000.
| Means the current display is frequency F, the left picture is    F=50.00Hz.
| Means the current positive active energy EImp, the unit is “kWh”, the left picture is EImp=1.20kWh.
| Means the current negative active energy EExp, the unit is “kWh”, the left picture is EExp=1.00kWh.
---|---
| Means the current combination active energy total ComEp, the unit is “kWh”, the left picture is ComEp=2.20kWh.
| Means the current communication protocol is Modbus.
| Represents 8 data bits, no effect bit and one stop bit of the current communication protocol.
| Means the current communication address is 11.
| Means the current communication baud rate is 9600.

Keyboard operation: After pressing the button for a long time, the display interface enters the switching interface of setting 645 protocol and Modbus protocol. Shortly press can switch the protocol, not the address page (only the ModBus  protocol can be switched to the address page), the address of ModBus can be set by the button, the button can set the address range 1-99.

4.3 Communication function
The instrument adopts RS485 communication mode with baud rate to be set as 1200, 2400bps, 4800bps and 9600bps.
For a same communication circuit, it can at most be connected with thirty-two instruments at the same time, with each instrument to be set as their communication address. For the communication connection, it should use shielded  twisted pair with copper mesh with wire diameter not below 0.5mm2 . On wiring arrangement, the communication line shall be away from strong cable or other strong electric field with the maximum transmission distance to be 1200m.  For the typical networking connection mode, please see the below figure, users can select other suitable connection mode based on detailed conditions.

When the instrument is set to be ModBus-RTU transmission mode, ModBus-RTU communication protocol adopts host-slave response in one communication line. Firstly, the host computer’s signal will seek for a terminal device (slave) with only one address, then the terminal device will produce response signal and transmit to the host computer in opposite direction, that is, half duplex working mode. This protocol only allows communication between the host (PC, PLC, etc.) and the terminal device, rather than data exchanges between the independent terminal devices. Thus, each terminal device will not occupy the communication circuits in their initialization, and only be limited to response the query signal to the host computer.
The instrument can provide ModBus-RTU communication protocol (see appendix A), for the parameter information to be read or modified by the communication, please see the below table.
Table 9 Communication parameter information

Parameter address| Parameter code| Instruction of the parameters| Type of data| Length of data Word| Read write attributes
---|---|---|---|---|---
0000H| UCode| Programming password code| 16-bit with symbols| 1| R/W
0001H| REV.| Reserved, actual read is the version number| 16-bit with symbols| 1| R
0002H| ClrE| Electric energy zero clearing CLr.E(1:zero clearing)| 16-bit with symbols| 1| R/W
0003H| RESERVED| RESERVED| 16-bit with symbols| 1|
---|---|---|---|---|---
0004H| RESERVED| RESERVED| 16-bit with symbols| 1|
0005H| Change Protocol| Protocol changing-over| 16-bit with symbols| 1| R/W
0006H| Addr| Communication address Addr| 16-bit with symbols| 1| R/W
0007H| RESERVED| RESERVED| 16-bit with symbols| 1|
0008H| RESERVED| RESERVED| 16-bit with symbols| 1|
0009H| RESERVED| RESERVED| 16-bit with symbols| 1|
000AH| RESERVED| RESERVED| 16-bit with symbols| 1|
000BH| Meter type| Meter type| 16-bit with symbols| 1| R
000CH| BAud| Communication baud rate bAud| 16-bit with symbols| 1| R/W
000DH| RESERVED| RESERVED| 16-bit with symbols| 1|
000EH| RESERVED| RESERVED| 16-bit with symbols| 1|
000FH| RESERVED| RESERVED| 16-bit with symbols| 1|
0010H| RESERVED| RESERVED| 16-bit with symbols| 1|
Electric quantity of the secondary side

2000H| U| Voltage| single precision floating decimal| 2| R
2002H| I| Current| single precision floating decimal| 2| R
2004H| P| Conjunction active power the unit is KW| single precision floating decimal| 2| R
2006H| Q| Conjunction reactive power the unit is Kvar| single precision floating decimal| 2| R
2008H| RESERVED| RESERVED| single precision floating decimal| 2| R
200AH| PF| Conjunction power factor| single precision floating decimal| 2| R
200CH| RESERVED| RESERVED| single precision floating decimal| 2| R
200EH| Freq| Frequency| single precision floating decimal| 2| R
2010H| RESERVED| RESERVED| single precision floating decimal| 2| R
Electrical data of the secondary side
4000H| Ep| Active in electricity| single precision floating decimal| 2| R
400AH| -Ep| Reverse in electricity| single precision floating decimal| 2| R

Change Protocol such as protocol switching, data for 2 for Modbus RTU protocol -, data to 1 for DL/T 645-2007；
The CLr. E power reset write 1 removal of total power；
BAud rate: 1:2400bps; 2:4800bps; 3:9600bps；；
4.4 Outline &Mounting Dimension
Outline dimension: 36mm×98mm×65mm；
DDSU666 single-phase electronic energy meter (DIN-Rail) current specification 0.25-5 (80)
A need to add transparent cove;
The front end of the meter shall meet the requirements of IP51, and it shall be used in the meter box meeting the requirements of IP5
Din rail mounting dimension: 35mm, with configuration to be shown as figure 5:

Installation & Operation Instruction

6.1 Inspection

1. Before installation, firstly check whether the model No. and specification of the product on the package is the same as the object. If not, please contact the supplier.
2. Check whether the product shell in the carton is damaged, if is, please contact the supplier.
   6.2 Installation
   Directly clip the instrument on the rail and install it on the distribution box.
   1）When installing, firstly clip one terminal of the slot and then clip to the rail with power.
   2）When disassembling, press the movable card with a screwdriver and take out the instrument.
   6.3 Wiring mode
   6.3.1 Instruction of wiring terminal
   Before powering, you must check whether the wiring mode of the instrument is correct, and the wiring diagram is shown as below:

Diagnosis, analysis and elimination of common faults

checking the connection, be sure the meter
| | voltage, the high&low end of the current and terminal labeling are different from actual number.| is in the state of disconnection, guarantee the safety of human life.
---|---|---|---
Communication fault| The communication setting information of the meter may be incorrect| Check if the communication setting information such as communication address, baud rate, verification mode is the same as  the PC settings.|

If the above method cannot eliminate the fault, please contact with the after- sale service of digital meter from Zhejiang CHINT Instrument Co., Ltd.

Transportation & Storage

The package of the instrument shall adopt materials complied with environmental protection, under package condition, the instrument and accessories shall be stored in the dry and ventilated places, to avoid humidity and corrosive gas  erosion, with the limited environmental temperature for storage to be -40℃～+70℃ and relative humidity not exceeding 75%.
Complete set of package for single product, including:

1. One set of instrument
2. One operation manual
3. One bag of desiccant
4. Certificate

Maintenance & Service

We guarantee free reparation and change for the multi-meter if found any unconformity with the standard, under circumstance of that the users fully comply with this instructions and complete seal after delivery within 18 months.
Appendix A: MODBUS-RTU Communication Protocol
A.1 Communication format
Information transmission adopts asynchronous mode, taking byte as the unit. The communication date transmitted between the host and slave computer is the format of 10-digit characters, including one start bit(0), 8 data bits without check bit, two stop bits(1)(other format can be customized).
Format of information frame:
Table A.1

A.2 Communication information transmitting procedure
When communication command is transmitted from the host computer to the slave computer, the slave computer which matches the address code sent by the host computer receives the communication command. If CRC checks without  any fault, then the corresponding operation will be carried out, after that the implement result (date) is returned to the host computer. The returned information contains address code, function code, implement date and CRC check code.
A.2.1 Address code
Address code is the first byte of each communication frame, with the range from 1 to 247. Each slave must have an exclusive address code in the bus, only the slave computer which matches the address code sent by the host computer can  respond returned information. When the slave computer returns the information, the returned data will begin with their respective address codes. The address code sent from the host computer indicates the slave address, the returned  address code from the slave computer indicates the slave address, while the corresponding address code indicates where the information comes from.
A.2.2 Function code
It’s the second byte of each communication frame. It’s sent by the host and tells the slave computer what actions should be carried out through function code. The slave will respond, and the functional code is the same as that sent by the  host computer, which indicates that the slave computer has responded the host and complemented the relative operation.
The instrument supports the following two function codes:
Table A.2

registers

A.2.3 Data area
The data field will be different based on different function codes. These data can be numerical values, reference addresses and so on. For different slave computers, both the address and data information are different, and the communication information table should be provided.
The host utilizes communicate command (function code 03H and 10H) to read and modify the data registers of the slave freely. But the data length which is read or write at one time should not be out of the effective range of the data register’s address.
A.3 Brief introduction of function code
A.3.1 Function code 03H：Read register
For example: The slave address which the host intends to read is 01H, the start register address is two register data of 0CH, sent by the host:
Table A.3

If the data of the slave register 0CH, 0DH is 0000H, 1388H, the slave will return:
Table A.4

A.3.2 Function code 10H：Write multi-port register
For example：The host intends to save data of 0002H, 1388H, 000AH into the slave address of 01H，the start register address is the three registers of 00H, sent by the host: Sent by the host:
Table A.5

Returned by the slave
Table A.6

A.4 16-digit CRC check code
The host or slave computer can be judged by the check code to see if the received information is correct or not. The interruption by electronic noises or other factors may cause errors during information transmission.
16-digit CRC check code is calculated by the host, located at the end of the transmit information frame. The slave recalculates the received information of CRC and compares if the calculated CRC goes in line with the received CRC, if not,  there is an error. Only 8 data bits are used during CRC calculation, both the start bits and the stop bits are not involved in the calculation. The calculation method of CRC check code is stated as follows：

1. Pre-arrange one 16-digit register as a hexadecimal FFFF ( i.e. fully 1), the register is called CRC register;
2. Make the first 8-digit binary data ( the first byte of the communication information frame) with the lower 8 digits of the 16-digit CRC register by XOR calculation, the result is placed in CRC register;
3. Shift the content of CRC register rightward by one digit (towards the lower digit) and fill in the highest digit with 0, check the shift-out digit after rightward shifting;
4. If the shift-out digit is 0: repeat step 3) (shift rightward one digit again);
   If the shift-out digit is 1: make CRC register with multinomial A001 by XOR calculation
5. Repeat step 3) and 4) until shift rightward for 8 times, then all the 8 digits are processed;
6. Repeat step 2) and 5), process the next byte of the communication information frame;
7. After calculating all the bytes of the communication information frame (exclude CRC check code) according to the above steps, the content of the CRC register to be get is: 16-digit CRC check code.
   A.5 Error handling
   When the meter detects other errors except the error of CRC check code, the information will be returned to the host, the highest digit of the function code is 1, i.e. the function code returned to the host from the slave is adding 128 base  on the function code sent from the host. The error returned from the slave is as follows:
   Table A.7

Address code| Function code（top digit is 1）| Error code| CRC check code low byte| CRC check code High byte
---|---|---|---|---
1 byte| 1 byte| 1 byte| 1 byte| 1 byte

Error code is as follows：
Table A.8

01H| Illegal function code| The function code received is not supported by the instrument
---|---|---
02H| Illegal register address| The register address received is out of the register address range
03H| Illegal data value| The data value received is out of the corresponding address data range

Dear clients,
Please assist us: when the product life is end, to protect our environment, please recycle the product or components, while for the materials that cannot be recycled, please also deal with it in a proper way. Really appreciate your cooperation and support.
Name of Company: Zhejiang Chint Instrument & Meter Co., Ltd.
Address: Wenzhou Bridge Industrial Zone, Yueqing, Zhejiang, China.

Zip Code：325603
Telephone：0577-62877777
Fax：0577-62891577
Technical hotline：0577-62919999
Fake Complaint： 0577-62789987
Website: http://www.chint.com
Email: ztyb@chint.com
Date of Issue: May, 2019.
No.: ZTY0.464.1224V1

References

• 正泰集团股份有限公司

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