View single post by slychiu | |||||||||||||
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Posted: Saturday Jan 27th, 2018 11:44 am |
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slychiu
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Comfiguring a Modbus system can be complex The Modbus addressing, Communications modes ie TCP or RTU, Modbus over IP must be understood. For RTU the baud rate and parity must be known, and whether the Modbus device is a Master or Slave and the meaning and usage of the Modbus Registers (Coil, Input Register, Holding Register, Discrete Input A good introduction is the wikipedia article https://en.wikipedia.org/wiki/Modbus Software Tools QModbusMaster is an excellent free software tool for testing UCM/Modbus in Slave Mode. The software can be set up as a Modbus Master to communicate with UCM/Modbus in Slave Mode. It works in RTU and IP modes. Download from https://sourceforge.net/projects/qmodmaster/ PyModSlave is a similarly good free tool for testing UCM/Modbus in Master Mode. The software can be set up as a Modbus Slave to communicate with UCM/Modbus in Master Mode. It works in RTU and IP modes. Download from https://sourceforge.net/projects/pymodslave/files/ Last edited on Saturday Jan 27th, 2018 11:56 am by slychiu |
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