This protocol simulator started one weekend as a test program while developing a SCADA/HMI with modbus RTU and TCP/IP and afterward came in useful testing an embedded gnu-Linux device too. It has worked so well for me, I decided to put a nice GUI onto it and release it for free.
The modbus protocol, also called open-mbus is implemented in many process control and monitoring devices, while most SCADA or HMI systems have a driver. Please download it to try it out.
- Why is it called MOD_RSSIM?
- Because it started out as a Modbus RS-232 Simulator ...but it grew as all applications do, I added TCP/IP support and later, Allen Bradley DF1 slave. Even a simple DF1 master with fixed polling.
Typical uses include:
- Verifying a SCADA/HMI configuration.
- Developing modbus master and slave drivers, for embedded devices and desktop platforms.
- Learning the Modbus protocols.
An intuitive, simple user-interface was my goal with the simulator, next I will try guide you through how to get started.
The simulator in the JOY machine mode using Allen-Bradley DF1 protocol
This simulator is free, if you do like it and want to encourage it's development, please donate via Sourceforge (or PayPal etc.) by clicking on the button to the left. It costs me about £15 a year for the domain, so random donations are appreciated.
This software program is released under the GPL version 3 license.
Windows 95 support may be dropped - I have released a Windows 7 (and Vista) update with version 8.19, which is a move forward, and means a minimum of Windows 2000 will be needed in future. Old binaries will still be available for download.
Job-search over: I found work at the end of January, after the small company I worked for laid a lot of staff off, ironically someone bought them up at the same time as I got new work again.
The author is currently NOT available for hire
Allen-Bradley is a trademark of Rockwell Corporation USA; MODBUS of Modicon USA; JOY is a trademark of Joy Mining Machinery UK; Windows is a trademark of Microsoft Corporation USA.
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