Siemens SIMATIC CPU 410 System Manual page 187

Possible fault scenarios during re-configuration
The following error scenarios are possible:
● The module receives the parameter data records but cannot evaluate them.
● Serious errors (in particular protocol errors on the DP bus) may cause the DP master to
completely suspend the corresponding DP slave, causing all modules of this station to
fail.
Re-configuration dependency on CPU modes
Re-configuration takes place after SDB evaluation (see Behavior of the CPU after download
of the configuration in RUN) in RUN mode. The INTF-LED is on during re-configuration.
The re-configuration process is interrupted during transition to HOLD. The process is
continued when the CPU changes to STOP or RUN. In STOP, only the calls of OB83 are
stopped.
Re-configuration is aborted if there is a power failure. Once power is restored, all existing DP
stations are re-configured.
Coordination between master systems
The sequence
● OB 83 start (start event W#16#3367)
● Data record transmission
● OB 83 start (start event W#16#3267 or 3968)
may run in parallel in the master systems in question.
OB calls in re-configuration
Once the CPU has run the tests described in "Behavior of the CPU after download of the
configuration in RUN", it starts OB 80 with the event W#16#350A. It then starts OB 83 with
the start event W#16#3367. This means that as of now the input or output data of the I/O
modules in question may no longer be correct. You may now no longer call any SFCs that
trigger new jobs for sending data records to the modules involved (for example SFC 57
"PARM_MOD"), otherwise a conflict could occur between the data records sent by the
system and those sent by the user.
Once the CPU has completed OB 83, it sends the parameter data records, with each module
involved receiving the total number of data records (regardless of how many data records
are affected by your change).
Another OB 83 start follows (start event W#16#3267 if sending was successful, W#16#3968
if it was not). No other priority class is interrupted by this processing of OB 83.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
11.9 Reconfigure existing modules in ET200M / ET200iSP stations
Plant changes in RUN - CiR
187