Taking the sample in official manual ( ) , pages 248-253 in the "CP1E CPU Unit Software User's Manual" (Image 04) describes a sample communication to an "Inverter Slave". The arduino will be in slave mode address 1 and the library used is "SimpleModbus NG" ( ). The CP1E will operate in "Modbus-RTU simple master" as illustrated in image 01. Briefly introduction, I would like to communicate and test the following hardwares:ġ- Omron CP1E (using an Option Port CP1W-CIF11) andĢ- Arduino Nano using MAX485 RS485 transceiver.
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