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CHECK
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0
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If the Field Device interface has received a request to provide a process data record, only the outputs NEW, SLOT, INDEX and RLEN are set. Multiple calls of this function block with MODE=0 returns the outputs for the same request.
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RECEIVE
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1
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If the Field Device interface has received a request, the function block outputs are updated.
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RECEIVE_BY_SLOT
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2
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If the Field Device interface has received a request for the slot and subslot the numbers of which are given in F_ID input, the function block outputs are updated.
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POS_RESPONSE
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3
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After checking or receiving the request to provide a process data record, this function block provides the requested process data record with its RECORD parameter and sends a positive response to the Host Controller.
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NEG_RESPONSE
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4
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After checking or receiving the request to provide a process data record, this function block refuses to provide this record and sends a negative response to the Host Controller. The error reason is given with the inputs CODE1 and CODE2.
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