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modbus-tcp pymodbus python

Read an holding register bit by bit Siemens

发布于 2020-07-23 14:42:13

I need to read a Siemens 1200 holding register bit by bit with python, searching on the web I found PyModbus an excellent library, but with it I'm only able to read the holding register such an integer and not bit by bit.

This is the code:

from pymodbus.client.sync import ModbusTcpClient

client = ModbusTcpClient('x.y.z.w', port=xxx)


result = client.write_registers(1, [1, 2, 4, 8, 16, 32, 64, 128, 256, 512]) # write some register

results = client.read_holding_registers(0, 50) # read the first fifty register like int
print("0-50", results.registers)
results = client.read_holding_registers(50, 50) # read the last fifty register like int
print("50-100:", results.registers)


client.close()

Someone have any hint?

Questioner
Giuseppe
Viewed
0
分享
Joao Luiz 2021-03-13 04:31:08 
from pymodbus.client.sync import ModbusTcpClient
from pymodbus.payload import BinaryPayloadDecoder
from pymodbus.constants import Endian

CLP_MB = ModbusTcpClient(['IP'], port=502)

adress_Tag=1
adress_Tag=int(adress_Tag)
size=50
value = CLP.read_coils(adress_Tag, size, unit=0)
#last part
value_bit_0 = int(value.bits[0])
value_bit_1 = int(value.bits[1])
..... 
you can use a for loop to automation this last part

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