Communication
3.2 Communication services
CPU 31xC and CPU 31x, Technical data
3-22 Manual, Edition 08/2004, A5E00105475-05
The following table provides you with 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 3-7 System and Standard Functions in PROFIBUS DP that must be Implemented with
Different Functions in PROFINET IO
Blocks PROFINET IO PROFIBUS DP
SFC55 (write dynamic
parameters)
No
(implement with SFB53)
Yes
SFC56 (write predefined
parameters)
No
(implement with SFB81 and
SFB53)
Yes
SFC57 (assign parameters to
module)
No
(implement with SFB81 and
SFB53)
Yes
You cannot use the following SIMATIC system and standard functions with PROFINET IO:
• SFC7 (trigger hardware interrupt on DP master)
• SFC11 (synchronize groups of DP slaves)
• SFC12 (deactivate and activate DP slaves)
• SFC72 (read data from a communication partner within local S7 station)
• SFC73 (write data to a communication partner within local S7 station)
• SFC74 (abort an existing connection to a communication partner within local S7 station)
Comparison of the Organization Blocks of PROFINET IO and PROFIBUS DP
Here, there are changes in OBs 83 and 86 as shown in the table below.
Table 3-8 OBs in PROFINET IO and PROFIBUS DP
Blocks PROFINET IO PROFIBUS DP
OB83 (removing and inserting
modules and submodules
during operation)
Also possible with an S7-300,
new error information
With an S7-300 not possible
Removing and inserting during
operation is reported by slaves
added using a GSD file by
means of a diagnostic interrupt;
in other words OB82.
With S7 slaves, OB86 is called
due to the station failure.
OB86 (rack failure) New error information Unchanged
Detailed Information
For detailed descriptions of the individual blocks, refer to the manual
System Software for
S7-300/400 System and Standard Functions
.
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