Tables, data records
3.3 Tables, PROFIBUS data records
SIMOCODE pro - Communication
158
Function Manual, 11/2018, A5E40508495002A/RS-AC/003
Writing / reading data records with STEP7
You can access the data records from the user program.
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Writing data records:
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S7-DPV1 master: by calling SFB 53 "WR_REC" or SFC 58
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S7 master: by calling SFC58
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Reading data sets:
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S7-DPV1 master: by calling SFB 52 "RD_REC" or SFC 59
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S7 master: by calling SFC 59
Further information
You will find further information about the SFBs:
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in Reference Manual System software for the S7-300/400, system and standard functions
https://support.automation.siemens.com/WW/view/en/44240604
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In the STEP7 online help
Byte arrangements
When data longer than one byte is stored, the bytes are arranged as follows ("big endian"):
Figure 3-2
Byte arrangement in "big endian" format
Abbreviations
See SIMOCODE pro – System Manual
https://support.industry.siemens.com/cs/ww/en/view/109743957