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I'm trying to read (PV process value) and write (SP set point) the temperature on a Omron E5CC temperature controller using LabVIEW, Modbus, RS-485. I'm new to Modbus and have installed the free LabVIEW modbus library. LabVIEW "Create Serial Slave" seems straight forward, but I'm having issues with "Read Holding Registers". I'm not sure what to input for "starting address" and "number of inputs". I attached the E5CC communications manual, I just can't make sense of the addresses and commands and where/ how I use them in the LabVIEW code. Also is there a easy command or operation I can execute to verify I can communicate with the device and all my protocol settings are correct? Thanks E5_C_CommunicationsManual_EN_201404_H175-E1-08.pdf