Communication problem?

niyaz432, no offense, but after reading your 4 posts until now, I can only recommend that you stay way from DCS systems.
If you are an end-customer, then get someone who knows about DCS to do the project for you.
If you are trying to sell a control system to a customer, then you are unqualified to do so by yourself. You could hire someone with the know-how to work for you or you company, maybe just for this one project.
 
hey guys..finally found out answer........actually my plc is supporting MODBUS MASTER PROTOCOL...i am using ML200-HONEYWELL PLC for BAG filter operation...and we done communication with ABB DCS by using..rs485 configuration ...i.e TX-RX, RX-TX, GND-GND. and also we checked through MODSCAN32 software....READ/WRITE bits STARTS WITH 40,001 onwards....
 

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