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Questions tagged [pymodbustcp]

A simple Modbus/TCP client library for Python. pyModbusTCP is pure Python code without any extension or external module dependency.

44 questions
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How to request Ebox wifi with modbus

I've never used modbus before. I have an eBox-Wifi Epever connected to an MPPT charge controller TRIRON for solar power. I was able to make it connect to my wifi and now has an accessible IP : 192.168.39.149 I just want to extract some data from it,…
bob dylan
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Pymodbus read and decode register value

I am new to modbus comunication, i have to read from an inverter a single value from one register using modbus protocol (i use python with pymodbus for this): From the inverter documentation i read about register documentation: Register ADR:…
Manuel Santi
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Read & Write Float in Modbus Python

Sorry for my bad english. I try to write and read float in a plc register in python via Modbus using pyModbusTCP lib. This is my code that unfortunatly didn't go... from pyModbusTCP.client import ModbusClient from pyModbusTCP import utils class…
CarloMatto
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pymodbus Modbus Server implementation with multiple slave devices context - writing to a register overwrites to all slaves

I have an issue with a simple pymodbus server implementation. From what I have read in the docs, this implementation should have unique slave contexts for each slave device, i.e. writing to device 0x01, register address 1, should be a different…
Crashtastic
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pyModbusTCP can you host multiple servers in the same program with different Slave ID's yet connecting to the same IP address?

So I'm attempting to make some software to replicate Modbus Devices for GUI and systems testing and demos. Issue is I want to run one Device Simulator Python Program on the same machine as it's connecting to so it'll be hosted on Localhost. I want…
mgillard
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create fully customised pymodbus requests

I'm new to pymodbus. I am trying to create a custom request to be sent to a TCP client, this specific request needs to have 3 exclamation marks at the beginning of the message. an example message request would be 21 21 21 01 7F 07 40 01 00 88 00…
Juan Navarro
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pyModbusTCP PC to PC connection

I'm trying to connect two pcs together using pyModbusTCP. When I run both the client and server locally using local host it works just fine. When I try and run them on separate PC's the client takes a while to "connect" and then just reads the…
joshuagws
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Modbus Simulation between two PCs using a USB connection with libmodbus or pymodbus

I am trying to connect to PCs (one master one slave) that will communicate with each other using the modbus protocol, I wanna use pymodbus (Python) or libmodbus (C++) to make this but I am relatively new to Modbus therefore I am not sure where to…
slavinium
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Reading coil and holding registers concurrently using pymodbus3

I have a working code that can reads the coil status continuously using pymodbus3 library. The code is something like below. This is adapted from a basic sample and serves the purpose of looking for the coil status(address 0x01) change to "1" and…
Arun
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How can i communicate between delta plc with Ethernet support and python pymodbustcp

please help me My first test is with a Delta DVP-12SE11R PLC and the connection is with the Modbus TCP/IP protocol. I have a python code written using pymodbustcp module. I have tested that code with a modbus slave simulator and it is working…
Akash Banaulikar
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pyModbusTCP: read/write_single_coil - what is the bit address in my case?

I am exploring the option to communicate with a device using the pyModbusTCP module and python. The vendor has sent me the Communication Protocol layout, but I don't understand how to relate the information from the manual and the input that…
heiko
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Converting Modbus response using pymodbus

I want to comunicate a PC with a smart meter which allows Modbus TCP communication, the PC will be the master and I just need read holding registers and show them in float format. I'm using python with pymodbus 2.2.0 My code is: from…
Andres AC
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Problem establishing connection over Python Modbus TCP to a Mitsubishi Inverter

I am trying to establish a Modbus connection from a laptop to a Mitsubishi inverter (FR A-800 E series) (the manual for this connection can be found [here][1]) I am using pymodbus and I can establish a connection, but the problem comes when I try to…
Bohm Arahnmob
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Detecting value of a discrete input through pymodbus

I currently dont have access to the plc that would be implemented and am unable to find much on the internet that covers reading discrete inputs. What im aiming for is something that will detect when a prox switch is turned on which could =true or 1…
Peddlur
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Not able to read and write holding registers directly from modbus server (pymodbus)

I currently have a local modbus-TCP network on my computer, consisting of a modbus server and two modbus clients. I want it to be a network of one server and one client, but currently have not been able to write and read holding registers from my…
Ravi
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