Data Sets (Bs) - Siemens 3RW44 Manual

PROFIBUS DP communication module

9.12 Data sets (BS)

9.12 Data sets (BS)
Reading/writing data sets with STEP 7
You can access the data sets of the soft starter from the user program.
● Writing data sets:
S7-DPV1 master: By calling up SFB 53 "WR_REC" or SFC 58
S7 master: by calling up SFC 58
● Reading data sets:
S7-DPV1 master: by calling up SFB 52 "RD_REC" or SFC 59
S7 master: by calling up SFC 59
Further information
You can find additional information about the SFBs
● in the reference manual "System Software for S7-300/400, System and Standard
Functions" (https://support.industry.siemens.com/cs/ww/en/view/1214574)
● in the STEP 7 online help
Byte arrangements
When data longer than one byte is stored, the bytes are arranged as follows ("big endian"):
Figure 9-9
186
Byte arrangement in "big endian" format
Manual, 03/2017, NEB535219502000/RS-AB/008
3RW44 soft starters