ID 442710.00 29WE KEEP THINGS MOVING
More about PROFINET?
6
Operation manual PROFINET
6.4.3.2.2 WRREC and RDREC – Structure
WRREC and RDREC have the following structure.
•REQ
WRREC, RDREC: data record transfer (1 = start)
•ID
WRREC, RDREC: logical address of a PROFINET IO subscriber;
automatically assigned
• INDEX
WRREC, RDREC: data record number; to ensure functioning acyclic
communication according to PROFIdrive 4.1, the associated value must
always be "47"
•LEN
WRREC: maximum length of the data record to be written (in bytes)
RDREC: length of the read data information (in bytes)
•MLEN
RDREC: maximum length of the data information to be read (in bytes)
•DONE
WRREC: status: data record was transferred
•VALID
RDREC: status: data record was received and is valid
•BUSY
WRREC: status: write process (BUSY = 1: not yet completed)
RDREC: status: read process (BUSY = 1: not yet completed)
• ERROR
WRREC: state: write process (EROR = 1: faulty)
RDREC: state: read process (EROR = 1: faulty)
•STATUS
WRREC: status WRREC or error information
RDREC: status RDREC or error information
•RECORD
WRREC: data record (consisting of header + data)
RDREC: target range for the read data record
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