I'm still a beginner when it comes to PLC's programming in general but I've had a fair bit of experience with SLC 500's and micrologix, but I've been playing about recently with the micro 800 and I was doing some modbus messaging to an ABB Acs550, it took many reads and rereads of the manuals to get it going and I can read holding registers and write to coils just fine. However the only way I figured out how to write to coils was mostly just by guessing..
So CCW uses words to read and write modbus messages, which was confusing coming from RSLogix 500 where it uses bits. The part I don't understand is why I have to write 1,2,4,6,8, etc to set coils 40001,40002, 40003, 40004, 40005? This may seen very basic to some people but after some research I still can't figure it out.
So CCW uses words to read and write modbus messages, which was confusing coming from RSLogix 500 where it uses bits. The part I don't understand is why I have to write 1,2,4,6,8, etc to set coils 40001,40002, 40003, 40004, 40005? This may seen very basic to some people but after some research I still can't figure it out.