Pymodbus reading from multiple energy meters Question: in our company we will install multiple energy meters (abb m4m ethernet 20). This energy meter works via modbus tcp/ip. I have a working python script for reading registers from one that we already have but the problem is that when we will have multiple of them how …
Modbus: Wrong response from the slave Question: I am trying to write data to DVP28SS2 controller using minimalmodbus in ascii mode. I have received a responce from thr controller but it seems wrong. In particular bits, corresponding to slave address and the function code don’t match them. The request is: 3A 30 31 31 30 …
Modbus missing bytes error using pymodbus as Serial/RTU master with arduino slaves runnning ArduinoModbus Question: I’m facing some issues with a Modbus RTU implementation. I have 2x Arduino MKR Zeros with RS485 hats/expansions as my 2 slave devices (using the ArduinoModbus library). I am trying to poll the devices from my PC (Windows) using python …
minimalmodbus read multiple register on same device Question: Is there a way where I can read a set of register on a device with the python library minimalmodbus? Or is it one by one I need to read_register like this? instrument.read_register(0x0033,1) Asked By: jvels || Source Answers: Look at the minimalmodbus documentation for read_registers(). You …
Python Modbus RTU over TCP Question: I am trying to read and write data over Modbus TCP with python. When I am using ModbusPoll with the following setup everything works. I try to read the data now with python and I am using the pymodbus library for this. My code looks like this: from pymodbus.client.sync …
unkown cause of pyModbusTCP timeout Question: I have a device connected via ethernet cable to the network. Its manual says it accepts modbusTCP communication protocol and indeed nmap in the configured port shows that a modbus service is open (nmap output at the end). I am no modbus expert but i found the pyModbusTCP python …
Python modbus library Question: I have to control a modbus device with a serial interface. I’ve got not experience with modbus. But my short research revealed several modbus libraries pymodbus MinimalModbus Modbus-tk uModbus What are the advantages/disadvantages, are there even better alternatives? Asked By: P3trus || Source Answers: It really depends on what application you’re …
