Siemens SIMATIC S7-400H System Manual page 338

System modifications during operation
17.9 Re-parameterization of a module
Calling OB 83
After transferring the parameter data records to the desired modules, OB 83 is called. The
sequence is as follows:
1. After you have made the parameter changes to an module in STEP 7 and loaded them in
RUN in the CPU, the OB 83 is started (trigger event W#16#3367). Relevant in the OB start
information are the logical start address (OB83_MDL_ADDR) and the module type
(OB83_MDL_TYPE). From now on, the input and/or output data of the module might no
longer be correct, and no SFCs that send data records to this module may be active.
2. After termination of OB 83, the parameters of the module are reset.
3. After termination of the parameter reset operation, the OB 83 is started again (trigger
event W#16#3267 if the parameterization was successful, or W#16#3968 if it was
unsuccessful). The input and output data of the module is the same as after an insertion
interrupt, meaning that under certain circumstances may not yet be correct. With immediate
effect, you can again call SFCs that send data records to the module.
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System Manual, 03/2012, A5E00267695-11
S7-400H