Communication
3.2 Communication services
CPU 31xC and CPU 31x, Technical Data
3-22 Manual, 01/2006 Edition, A5E00105475-06
Comparison of the Organization Blocks of PROFINET IO and PROFIBUS DP
Here, there are changes in OB 83 and OB 86, as shown in the following table.
Table 3-8 OBs in PROFINET IO and PROFIBUS DP
Blocks PROFINET IO PROFIBUS DP
OB 83 (removing and inserting
modules during operation)
Also possible with an S7-300,
new error information
With an S7-300 not possible
Removing and inserting
modules during operation is
reported by slaves added using
a GSD file by means of a
diagnostic interrupt; in other
words OB 82.
In the case of S7 slaves, a
swapping interrupt causes a
station failure to be reported and
OB 86 to be called.
OB 86 (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
.
3.2.10.3 System status lists (SSLs) in PROFINET IO
Content of this Section
This section explains the following:
• Which system status lists are intended for PROFINET IO
• Which system status lists are intended for PROFIBUS DP
• Which system status lists are intended for both PROFINET IO and PROFIBUS DP
Introduction
The CPU of the SIMATIC modules can provide you with certain information. The CPU stores
this information in the "system status list".
The system status list describes the current status of the automation system. It provides an
overview of the configuration, the current parameter assignment, the current statuses and
sequences in the CPU, and the assigned modules.
The system status list data are read-only; they cannot be changed. The system status list is
a virtual list that is compiled only on request.
With the help of a system status list you receive the following information via the PROFINET
IO system:
• System data
• Module status information in the CPU
• Diagnostic data on module
• Diagnostic buffer
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