Entry type: FAQ, Entry ID: 21626358, Entry date: 06/20/2005

CP 342-5 -- How do you program data communications when your DP slave only has outputs?

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If the DP configuration of a CP 342-5 includes only one or multiple slaves that only have outputs, it is not necessary to call the FC 2 "DP_RECV".

In some older versions of the CP 342-5 DA 02 (firmware V5.0) you must use FC 2 "DP_RECV" with a data length of 0 bytes or use "dummy" inputs. You must define the ANY pointer required by the DP_RECEIVE call with a data length of 0 bytes.

FAQ 14557906 has been incorporated into the present FAQ and deleted as a separate FAQ.