pyModSlave

pyModSlave is a free, Python-based Modbus slave application for simulation purposes. It supports Modbus RTU and TCP, includes a built-in bus monitor for examining all traffic on the bus, and can be run as a Python module or as a standalone GUI (Windows only — unzip and run, no installation required).
pyModSlave is based on modbus-tk, pySerial, and PyQt5.

The repository has moved to GitHub: https://github.com/elbarbas/pyModSlave. SourceForge will continue to host updated binary releases, but the latest source code is maintained on GitHub.

PyPI: https://pypi.org/project/pyModSlave/

Related project: QModMaster https://github.com/elbarbas/QModMaster — a Modbus master application

Video demos:
- Modbus RTU: https://youtu.be/1get1ELKz_A
- Modbus TCP: https://youtu.be/nX_kTQwK2f4
- Session: https://youtu.be/y_9Di7E3y8w
- Log: https://youtu.be/Xcb6sj1uzyY

Features

ModBus RTU/TCP Slave
Simulate Coils, Discrete Inputs, Input Registers, Holding Registers
Monitor Bus activity [Raw Data and PDU details]
Supports both Windows and Linux

Project Samples

Project Activity

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License

GNU Library or Lesser General Public License version 3.0 (LGPLv3)

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pyModSlave Web Site

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User Reviews

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jimfitz101 Posted 2022-09-26

This looks great but I can't use it because I need Modbus RTU/ASCII protocol and there doesn't seem to be an option for it.
c4rl0s Posted 2022-06-22

So far so good! this tool is great!!!
minal29 Posted 2015-10-12

whenever I try to connect to master it given me message saying "slave threw exception" connection timed out.. Where can I get detailed document for the user? plz help me out

Additional Project Details

Intended Audience

Advanced End Users, Engineering, Telecommunications Industry

User Interface

Programming Language

Python

Related Categories

Python Communications Software, Python Interface Engines

Registered

2012-03-30

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