AC450 & S7-300 interface
As title, I am trying to make profibus DP connection between ABB AC450 and Siemens S7-300 PLC, but I have could not make it.
Seems I have been missing something.
My question is that
1. Is it possible to make profibus DP connection between them?
2. If so, what should I check?
Best regards, JS Choi
Voted best answer
You may have seen this already ... http://www402.abbext.com/how-connect-Profibus-AC450-q1086751.aspx
The AC450 Profibus interface can be unreliable. You should carefully consider the impact on the process if the interface fails.
The CP342-5 has three modes (DP Master/DP Slave/No DP) and it must be set to DP Slave mode as per Siemens manual attached
You build a FC1 and FC2 to copy your datablocks containing data to be exchanged (one for each direction) into and out of the CP342-5 communications card memory.
In my example I tested 1 byte DO / Consistency 1 byte and 1 byte DI / Consistency 1 byte for two way data exchange. One word of advice is to configure the PBSD for the exact same number of bytes being exchanged defined in the FC1 & FC2
We have expanded this pilot to the live plant PLC system and it works for the full registers we are exchanging.