PROFIBUS DP Communication Module
SIRIUS 3RW44 manual
8-40 GWA 4NEB 535 2195-02 DS 06
8.12 Data Sets
Writing/reading data sets with STEP 7
You can access the soft starter data sets via 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
For further information regarding SFBs, please refer to
• the reference manual
"System software for S7-300/400, System and Standard Functions"
• in the STEP 7 online help
Byte arrangements
When data are stored which are longer than one byte, the bytes are arranged as
follows ("big endian")
Table 8-16: Byte arrangement in "big endian" format
Byte arrangement Data type
Byte 0 High byte High word Double word
Byte 1 Low byte
Byte 2 High byte Low word
Byte 3 Low byte
Byte 0 High byte Word
Byte 1 Low byte
Byte 0 Byte 0 Byte
Byte 1 Byte 1
To Next Page
Loading...
