PROFINET
6.4 Blocks in PROFINET IO
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
6-7
Blocks PROFINET IO PROFIBUS DP
SFC 71
Query the slot belonging to a
logical address
Yes Yes
The following table provides an overview of the system and standard functions for SIMATIC,
whose functionality must be implemented by other functions when converting from
PROFIBUS DP to PROFINET IO.
Table 6-2 System and Standard Functions in PROFIBUS DP that must be Implemented with
Different Functions in PROFINET IO
Blocks PROFINET IO PROFIBUS DP
SFC 54
Read predefined parameters
No
Replacement: SFB 81
Yes
SFC 55
Write dynamic parameters
No
Replicate via SFB 53
Yes
SFC 56
Write predefined parameters
No
Replicate via SFB 81 and SFB
53
Yes
SFC 57
Assigning module parameters
No
Replicate via SFB 81 and SFB
53
Yes
You cannot use the following SIMATIC system and standard functions with PROFINET IO:
● SFC 7 Trigger hardware interrupt on DP master
● SFC 11 Synchronize groups of DP slaves
● SFC 72 Read data from a communication partner within local S7 station
● SFC 73 Write data to a communication partner within local S7 station
● SFC 74 Abort an existing connection to a communication partner within local S7 station
● SFC 103 Determine the bus typology in a DP master
Comparison of the Organization Blocks of PROFINET IO and PROFIBUS DP
The following table lists the changes at OBs 83 und OB 86:
Table 6-3 OBs in PROFINET IO and PROFIBUS DP
Blocks PROFINET IO PROFIBUS DP
OB 83
Removing and inserting
modules during operation
New error information Unchanged
OB 86 Rack failure New error information Unchanged
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