Basic Info.
Usage
Meter for Industry and Home Use, Standard Electric Energy Meter, Multi-Functional Energy Meter, Watt-Hour Meter
Accessory
Shunt+USB Converter
Voltage Range
0.05-300V DC
Specification
9*6.05*2.3cm
Product Description
This document describes the specification of the PZEM-003/017 DC communication module, the module is mainly used for measuring DC voltage, current, active power, frequency and energy consumption, the module is without display function, the data is read through the RS485 interface.
We provide the software to connect it with the PC, all Win system can be used. If you want to connect it with other terminal device such as PLC,SCM and so on, please prepare the fitable cable and write the program by yourself.
PZEM-003: Measuring Range 10A (Built-in Shunt)
PZEM-017: Measuring Range 50A,100A,200A,300A (the current range is depend on the external shunt specification )
PZEM-017 DC 300V 100A RS485 Electric Smart Energy Meter
| Product Type | PZEM-017 DC electric Module without display with RS485 communication serial |
| Function | This document describes the specification of the PZEM-003/017 DC communication module, the module is mainly used for measuring DC voltage, current, active power, frequency and energy consumption, the module is without display function, the data is read through the RS485 interface.. |
|
| Test Parameters Range | 1. Voltage: 0.05~300V |
| 2. Current: 0-10A/0~100A |
| 3. Power: 0.1~3KW/0.2-90KW |
| 4. Energy: 0~9999kWh |
| Accuracy | 0.5grade |
| Current resolution | 0.001A |
| Power resolution | 0.1W |
| Product Size | 90*60.5*23mm |
| Unit Weight | 299g |
| package | Carton |
| Precautions | RS485 interface is passive output, need external connect 5V power supply and the the external power supply should >100mA.
When the input test voltage is less than 7V, it must supply 5V independent work voltage through MICRO USB port;
Note: Do not use the USB port bring by your PC to be the independent power supply, otherwise it may damage your PC |
1. Function description
1.1 Voltage
1.1.1 Measuring range:0.05-300V. (when the test voltage is <7V, please use the independent power supply mode)
1.1.2 Resolution:0.01V.
1.1.3 Measurement accuracy:1%.
1.2 Current
1.2.1 Measuring range:0.01-10A(PZEM-003);0.02-300A(PZEM-017;can be matched with 50,100,200,300A four kinds of shunt).
1.2.2 Resolution:0.01A
1.2.3 Measurement accuracy:1%
1.3 Power
1.3.1 Measuring range:0.1-3kW(PZEM-003);0.2-90kW(PZEM-017)
1.3.2 Resolution: 0.1W
1.3.3 Measurement accuracy:1%
1.4 Energy Consumption
1.4.1 Measuring range: 0-9999kWh
1.4.2 Resolution: 1Wh
1.4.3 Measurement accuracy:1%
1.4.4 Reset energy: use software to reset.
1.5 Over Voltage alarm
Voltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm
The default high voltage threshold is 300V, the default low voltage threshold is 7V.
1.6 Communication interface
RS485 interface.
2. Communication protocol
2.1 Physical layer protocol
Physical layer use UART to RS485 communication interface.
Baud rate is 9600, 8 data bits, 2 stop bit, no parity.
2.2 Application layer protocol
The application layer use the Modbus-RTU protocol to communicate. At present, it only supports function codes such as 0x03 (Read Holding Register), 0x04 (Read Input Register), 0x06 (Write Single Register), 0x41 (Calibration), 0x42 (Reset energy).etc.
0x41 function code is only for internal use (address can be only 0xF8), used for factory calibration and return to factory maintenance occasions, after the function code to increase 16-bit password, the default password is 0x3721.
The address range of the slave is 0x01 ~ 0xF7. The address 0x00 is used as the broadcast address, the slave does not need to reply the master. The address 0xF8 is used as the general address, this address can be only used in single-slave environment and can be used for calibration etc.operation.
2.3 Read the measurement result
The command format of the master reads the measurement result is(total of 8 bytes):
Slave Address + 0x04 + Register Address High Byte + Register Address Low Byte + Number of Registers High Byte + Number of Registers Low Byte + CRC Check High Byte + CRC Check Low Byte.
The command format of the reply from the slave is divided into two kinds:
Correct Reply: Slave Address + 0x04 + Number of Bytes + Register 1 Data High Byte + Register 1 Data Low Byte + ... + CRC Check High Byte + CRC Check Low Byte
Error Reply: Slave address + 0x84 + Abnormal code + CRC check high byte + CRC check low byte
Abnormal code analyzed as following (the same below)
0x01,Illegal function;
0x02,Illegal address;
0x03,Illegal data;
0x04,Slave error.
The register of the measurement results is arranged as the following table
Register address Description Resolution
0x0000 Voltage value 1LSB correspond to 0.01V
0x0001 Current value 1LSB correspond to 0.01A
0x0002 Power value low 16 bits 1LSB correspond to 0.1W
0x0003 Power value high 16 bits
0x0004 Energy value low 16 bits 1LSB correspond to 1Wh
0x0005 Energy value high 16 bits
0x0006 High voltage alarm status 0xFFFF is alarm,0x0000 is not alarm
0x0007 Low voltage alarm status 0xFFFF is alarm,0x0000 is not alarm
For example, the master sends the following command (CRC check code is replaced by 0xHH and 0xLL, the same below):
0x01 + 0x04 + 0x00 + 0x00 + 0x00 + 0x08 + 0xHH + 0xLL
Indicates that the master needs to read 8 registers with slave address 0x01 and the start address of the register is 0x0000.
The correct reply from the slave is as following:
0x01 + 0x04 + 0x10 + 0x27 + 0x10 + 0x00 + 0x64 + 0x03 + 0xE8 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0x00 + 0xHH + 0xLL
The above data shows
Voltage is 0x2710,converted to decimal is 10000,display 100.00V;
Current is 0x0064,converted to decimal is 100,display 1.00A;
Power is 0x000003E8,converted to decimal is 1000,display 100.0W;
Energy is 0x00000000,converted to decimal is 0,display 0Wh;
High voltage alarm status 0x0000,indicates the current voltage is lower than the high voltage threshold.
Low voltage alarm status 0x0000,indicates the current voltage is higher than the low voltage threshold.
2.4 Read and modify the slave parameters
At present,it only supports reading and modifying slave address and power alarm threshold
The register is arranged as the following table
Register address Description Resolution
0x0000 High voltage alarm threshold(5~350V),default is 300V 1LSB correspond to 0.01V
0x0001 Low voltage alarm threshold(1~350V),default is 7V 1LSB correspond to 0.01V
0x0002 Modbus-RTU address The range is 0x0001~0x00F7
0x0003 The current range(only for PZEM-017) 0x0000:100A
0x0001:50A
0x0002:200A
0x0003:300A
The command format of the master to read the slave parameters and read the measurement results are same(described in details in Section 3.3), only need to change the function code from 0x04 to 0x03.
The command format of the master to modify the slave parameters is (total of 8 bytes):
Slave Address + 0x06 + Register Address High Byte + Register Address Low Byte + Register Value High Byte + Register Value Low Byte + CRC Check High Byte + CRC Check Low Byte.
The command format of the reply from the slave is divided into two kinds:
Correct Response: Slave Address + 0x06 + Number of Bytes + Register Address Low Byte + Register Value High Byte + Register Value Low Byte + CRC Check High Byte + CRC Check Low Byte.
Error Reply: Slave address + 0x86 + Abnormal code + CRC check high byte + CRC check low byte.
For example, the master sets the slave's high voltage alarm threshold:
0x01 + 0x06 + 0x00 + 0x01 + 0x4E + 0x20 + 0xHH + 0xLL
Indicates that the master needs to set the 0x0001 register (low voltage alarm threshold) to 0x4E20(200.00V).
Set up correctly, the slave return to the data which is sent from the master.
For example, the master sets the low voltage alarm threshold of the slave
0x01 + 0x06 + 0x00 + 0x02 + 0x03 + 0xE8 + 0xHH + 0xLL
Indicates that the master needs to set the 0x0002 register (low voltage alarm threshold) to 0x03E8(10.00V).
Set up correctly, the slave return to the data which is sent from the master.
For example, the master sets the address of the slave
0x01 + 0x06 + 0x00 + 0x03 + 0x00 + 0x05 + 0xHH + 0xLL
Indicates that the master needs to set the 0x0003 register (Modbus-RTU address) to 0x0005
Set up correctly, the slave return to the data which is sent from the master.
2.5 Reset energy
The command format of the master to reset the slave's energy is (total 4 bytes):
Slave address + 0x42 + CRC check high byte + CRC check low byte.
Correct reply: slave address + 0x42 + CRC check high byte + CRC check low byte.
Error Reply: Slave address + 0xC2 + Abnormal code + CRC check high byte + CRC check low byte
2.6 Calibration
The command format of the master to calibrate the slave is (total 6 bytes):
0xF8 + 0x41 + 0x37 + 0x21 + CRC check high byte + CRC check low byte.
Correct reply: 0xF8 + 0x41 + 0x37 + 0x21 + CRC check high byte + CRC check low byte.
Error Reply: 0xF8 + 0xC1 + Abnormal code + CRC check high byte + CRC check low byte.
It should be noted that the calibration takes 3 to 4 seconds, after the master sends the command, if the calibration is successful, it will take 3 ~ 4 seconds to receive the response from the slave.
2.7 CRC check
CRC check use 16bits format, occupy two bytes, the generator polynomial is X16 + X15 + X2 +1, the polynomial value used for calculation is 0xA001.
The value of the CRC check is all results of a frame data checking divide CRC
FAQQ: Can I get better price?
A: Prices are different for different order quantity and specific demands. We would like to offer you very good price to help you enlarge the market share.
Q: Are factory or only company?
A: We are factory of AC DC digital panel meter .
Q: How about the shipping cost?
A: If your goods is small for LCL, we can send goods to you via counier, such as FEDEX,TNT,there is good rate from our side.
If your goods is FCL, it need be sent via sea, we can send you frieght quotations DDU or FOB,CIF, you can choose whether use our forwarder or yours.
Q: How about the sample time? What is the payment?
A: You can come to my official store in aliexpress to place the sample order, we will ship it out with in 3-5 days after the payment.
T/T , alibaba trade assurance etc,we can talk all the possibilities.
Q: Is your product in good quality?
A: The quality is depended on the price.And it is better to purchase the sample to test the quality first,then place an order.
Q: Could you make OEM with our logo?
A: Yeah,we have factory to produce the goods to you with your own logo..It depend on your quantity.
Q: Why do I choose you?
A: 1): Reliable---we are the real company, we dedicate in win-win
2): Professional---we offer the newest digital panel meter.
3): Factory---we are the manufacturer, so we have the Stable product source,reliable technical support and reasonable price
Q: Where is your Loading Port?
A: Ningbo,China
Shanghai, China
Other China port is accepted.
Q: How to control Quality of Mass?
A: We have our own QC Team (5 workers). Every step of mass production will be inspected in time.
Q: How long will you guarantee the mass quality?
A: We will be responsible for our mass even the mass are in your warehouse. We Trust our Quality.
Almost more than 95% clients will cooperated with us for long time from 1st order.
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A: Yes, after we ship the cargo, we will provide the tracking number for your order to you, and
you can view the shipment status on the corresponding shipping company website.
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A: Yes, we have an official store on aliexpress, If you need retail service you can come here.
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A: Sure, our factory is in Ningbo. Pls let us know when you come, we will pick up you at airport.
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