Communication
SIMOCODE pro
12-24 GWA 4NEB 631 6050-22 DS 03
12.7 Data records
Data records contain additional information about the DP slave which can
only be read or partly written.
These data records can be accessed for reading and writing via acyclic DPV1
functions. This makes it possible, for example, to operate, monitor and
parameterize SIMOCODE pro.
You can use these functions if they are supported by the DP master. You will
find an overview of the data records provided by SIMOCODE pro in
Chapter B "Data formats and data records".
Special function blocks must be started in the user program in the PLC for
access to the DPV1 data records unlike access to cyclic I/O data.
Access to data records in STEP7
Read and write access to data records is gained by starting the system
functions SFC 59 "RD_REC" and SFC 58 "WR_REC" or via system function
blocks SFB 52 "RDREC" and SFB 53 "WRREC" for CPUs that support the
"DPV1" DP mode.
Note
The interface of the SFB 52 "RDREC" and the SFB 53 "WRREC" is identical to
the FB "RDREC" and "WRREC" as defined in the "PROFIBUS Guideline
PROFIBUS Communication and Proxy Function Blocks according to IEC
61131-3" standard.
You will find further information about SFB and SFC in the STEP7 online
help.
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