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PZEM-014/016 AC communication module
Overview
This document describes the specification of the PZEM-014/016 AC communication module,
the module is mainly used for measuring AC voltage, current, active power, frequency, power
factor and active energy, the module is without display function, the data is read through the
RS485 interface.
PZEM-014: Measuring Range 10A (Built-in Shunt)
PZEM-016: Measuring Range 100A (external transformer)
Software Address:
https://drive.google.com/file/d/1u0xaFGXtk3bjz-5hDOM0zfWMPkqmTyvq/view?usp=sharing
1.Function description
1.1 Voltage
1.1.1
Measuring range:80～260V
1.1.2
Resolution: 0.1V
1.1.3
Measurement accuracy: 0.5%
1.2 Current
Measuring range: 0～10A(PZEM-014); 0～100A(PZEM-016)
1.2.1
Starting measure current: 0.01A(PZEM-014); 0.02A(PZEM-016)
1.2.2
1.2.3
Resolution: 0.001A
1.2.4
Measurement accuracy: 0.5%
1.3 Active power
1.3.1
Measuring range: 0～2.3kW(PZEM-014); 0～23kW(PZEM-016)
1.3.2
Starting measure power: 0.4W
1.3.3
Resolution: 0.1W
1.3.4
Display format:
＜1000W, it display one decimal, such as: 999.9W
≥1000W, it display only integer, such as: 1000W
1.3.5
Measurement accuracy: 0.5%
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Summary of Contents for Morning PZEM-014
- Page 1 PZEM-014/016 AC communication module Overview This document describes the specification of the PZEM-014/016 AC communication module, the module is mainly used for measuring AC voltage, current, active power, frequency, power factor and active energy, the module is without display function, the data is read through the RS485 interface.
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Page 2: Communication Protocol
1.4 Power factor 1.4.1 Measuring range: 0.00～1.00 1.4.2 Resolution: 0.01 1.4.3 Measurement accuracy: 1% 1.5 Frequency 1.5.1 Measuring range: 45Hz～65Hz 1.5.2 Resolution: 0.1Hz 1.5.3 Measurement accuracy: 0.5% 1.6 Active energy 1.6.1 Measuring range: 0～9999.99kWh 1.6.2 Resolution: 1Wh 1.6.3 Measurement accuracy: 0.5% 1.6.4 Display format: ＜10kWh, the display unit is Wh(1kWh=1000Wh), such as: 9999Wh... - Page 3 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.
- Page 4 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 + 0x0A + 0xHH + 0xLL Indicates that the master needs to read 10 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 + 0x14 + 0x08 + 0x98 + 0x03 + 0xE8+0x00 + 0x00 +0x08 + 0x98+ 0x00 +...
- Page 5 For example, the master sets the slave's power alarm threshold: 0x01 + 0x06 + 0x00 + 0x01 + 0x08 + 0xFC + 0xHH + 0xLL Indicates that the master needs to set the 0x0001 register (power alarm threshold) to 0x08FC (2300W).
- Page 6 Functional block diagram Picture 3.1 PZEM-014 Functional block diagram Picture 3.2 PZEM-016 Functional block diagram Wiring diagram...
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Page 7: Other Instructions
Picture 4.1 PZEM-014 wiring diagram Picture 4.2 PZEM-016 wiring diagram Other instructions 5.1 Power supply AC voltage provides two isolated outputs after through the switching power supply, one way is 3.3V provides to the measurement system, the other way is 5V provides to 485 communication circuits and external circuits.
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