A
Dear Sir,
I have MODBUS/RTU (RS485) communication between my DCS and IS-PC (HMI Located at field). My communication is okay, but it shows only DI value like on/off only. AI value is fluctuating, i.e., if I have given 25 as force value from DCS, it’s appearing fluctuating sometimes showing just #### and again 0 or -0 like this.
please suggest why such kind of thing is happening.
Please note: Terminator resistor is in line for Tx and Rx and two-wire communication. IS-PC is STAHL make.
Regards
Ashish K
I have MODBUS/RTU (RS485) communication between my DCS and IS-PC (HMI Located at field). My communication is okay, but it shows only DI value like on/off only. AI value is fluctuating, i.e., if I have given 25 as force value from DCS, it’s appearing fluctuating sometimes showing just #### and again 0 or -0 like this.
please suggest why such kind of thing is happening.
Please note: Terminator resistor is in line for Tx and Rx and two-wire communication. IS-PC is STAHL make.
Regards
Ashish K