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ModRSsim2 Modbus Slave/Server RTU/TCP and DF1 Simulator

 

If you are looking for a Modbus RTU/TCP Slave/Server simulator software under Windows, have a look at ModRSsim2

  • FREE software
  • Simulate up to 255 Modbus slaves
  • Open source
  • Supports ALL Modbus data types
  • Diagnostic view that shows you the traffic
  • Supports scripting for simulation

You will find many links on the Internet concerning this software, but some of them are old or are paid versions!

For a Modbus RTU/TCP Master, take a look at the ModbusDoctor – a great Modbus Master Windows Software (Use the keyboard 1 or 0 for change Bit values)