![]() ![]() ![]() I have been successfull in reading and writing data with S7-200 using modbus master library and salve set as modbus rtu.It was very easy. On Rs485 as MODBUS rtu, MODBUS ASCII AND TAIE(OLD ASCII). I have cpu 315,cp341 rs485/422 with dongle and modbus master driver downloaded from siemens site and on the slave side i have Honeywell DC1040 digital controller with 3 connectivity ![]() Following is what hardware i have and what i have tried out uptill now. ![]()
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