PROFINET
8.3 Blocks in PROFINET IO
S7-400H
System Manual, 03/2012, A5E00267695-11
99
8.3 Blocks in PROFINET IO
Compatibility of the New Blocks
For PROFINET IO, some new blocks were created, among other things, because larger
configurations are now possible with PROFINET. You can also use the new blocks with
PROFIBUS.
Comparison of the system and standard functions of PROFINET IO and PROFIBUS DP
For CPUs with an integrated PROFINET interface, the table below provides you with an
overview of the following functions:
● System and standard functions for SIMATIC that you may need to replace when
migrating from PROFIBUS DP to PROFINET IO.
● New system and standard functions
Table 8- 1 System and standard functions that are new or have to be replaced
Blocks PROFINET IO PROFIBUS DP
SFC 13"DPNRM_DG"
Reading diagnostics data of a
DP slave
No
Replacement:
Event-related: SFB 54
Status-related: SFB 52
Yes
SFC 58 "WR_REC"
SFC 59 "RD_REC"
Write/read record in the I/O
devices
No
Replacement: SFB 53/52
Yes, if you will have not already
replaced these SFBs under
DPV 1 by SFB 53/52.
SFB 52 "RDREC"
SFB 53 "WRREC"
Read/write record
Yes Yes
SFB 54 "RALRM"
Evaluating alarms
Yes Yes
SFB 81 "RD_DPAR"
Reading predefined parameters
Yes Yes
SFC 5 "GADR_LGC"
Determining the start address of
a module
No
Replacement: SFC 70
Yes
SFC 70 "GEO_LOG"
Determining the start address of
a module
Yes Yes
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