The PLCTalk forum pick of the week this week is about Modbus simulator software.
- Modbus Simulator software, free download
- Modbus Master Simulator software, free download
- Free Modbus Simulator Software
- Modbus Simulator Software
The question
The best MODBUS Software which we find good and easy to use is Modbus Poll which help in testing and simulation of MODBUS protocol. This Software is a shareware software from ModbusTools and support several Modbus slaves at the same time as you just have to specify the Modbus slave ID, function, address, size and poll rate in each window. Modbus master/slave simulator for test and debug of your master/slave devices. Supports Modbus RTU and Modbus TCP/IP. Supported protocol variants.
- What software out there scans Modbus registers from a PC and provides confirmation of a good connection?
- Do any of the software options scan registers on a slave/node? ( automatic scanning inferred)
In a typical setup, the PLC would be connected to a computer with a USB -RS232 adapter or a USB-RS485 adapter.
4 Modbus Simulation Software options
1. http://www.win-tech.com/html/demos.htm
This site seems to offer Modbus simulator and OPC tools. With the Modbus tool, there is an indication of a succesful connection. There is an evaluation version of the software downloadable. The full version is not free.
Modbus Simulator software, free download
2. modbustools.com
There seem to be several Modbus simulators and polling tools offered here. This software is also not free. There seems to be a trial version that works for 10 minutes at a time for the first 30 days. This software includes options to log data to Excel and text files. It is unclear if there is confirmation of ‘good connection’ provided per the original question.
Modbus Master Simulator software, free download
There is also an option create a custom frame which might be useful for testing and debugging purposes.
3. https://sourceforge.net/projects/qmodmaster/
This is a free, open -source project built on a framework called qt. New to me, interesting concept. There is a bus monitor to see live frames. The latest update was in February 2016. Seems promising mostly 4 and 5 star ratings from its 9 reviews.
4. http://www.schneider-electric.com/en/faqs/FA180037/
Finally, the software I have used for Modbus TCP testing. Schneider Electric has a free serial and Modbus TCP tester software. Unlike ModScan and some of the other options out there, this tool doesn’t include a live frame by frame view of communications.
Free Modbus Simulator Software
In all cases, the option to automatically scan ‘live/open’ registers on a network didn’t seem to be something common on the market ( keyword:automatic). For Modbus networks with communications already up and running, the best bet would be to use a a communication viewer screen. This would show the frames on the network with addresses, commands and responses.
Modbus Simulator Software
Link to the actual thread on PLCTalk.