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How to use read_holding register in pymodbus?
A piece of product documentation
Socomec products implement functions :
- 3 : to read n Words ( Maximum 125 words )
- 6 : to write 1 word
- 16 : to write n Word
Dec. address hex. Address Words count Description Unit Data Type
50770 C652 2 Total Positive Active Energy (no resetable) : Ea+ kWh U32
There is a piece of code
from pymodbus.client.sync import ModbusSerialClient as ModbusClient
client = ModbusClient(method = "rtu", port="COM1",stopbits = 1, bytesize = 8, parity = 'N',baudrate= 9600)
client.connect()
request = client.read_holding_registers(address=50532,count=2,unit=6)
print request.getRegister(1)
client.close()
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www.agrostroy.ru/index.php?page=4 - here is the modbus tester. Acts as a master. Can both request registers and write. Ask around and see what he answers. Matches or not with your testimony.
In general, if the exchange is via RS-485, then you can sit in parallel and see what is happening in the port. freeserialanalyzer.com/features - these for example.
the unit parameter is the address of the device?
you give the address 50770 from the document, but you ask for 50532 - is that normal?
getRegister takes what parameter?
and unintelligible - what is it? Does your device on the face reflect energy? Maybe the resulting number still needs to be converted. What does the documentation say about this?
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