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Communication functions and resulting jobs
After it has received one of the jobs specified below, the CPU must in turn generate
communication jobs and output them to other modules. These include, for example, jobs for
reading or writing parameterization data records from/to distributed I/O modules. These jobs
are rejected until the update is completed.
● Reading/writing of data records using HMI functions
● Reading data records using SSL information
● Disabling and enabling messages
● Logon and logoff for messages
● Acknowledgement of messages
16.12.3
Switch to CPU with modified configuration or expanded memory configuration
Switchover to CPU with modified configuration
You may have modified the following elements on the standby CPU:
● The hardware configuration
When you initiate the link-up and update operation from STEP 7 with the "Switch to CPU
with modified configuration" option, the system reacts as follows with respect to handling of
the memory contents.
Load memory
The contents of the load memory are not copied from the master to the standby CPU.
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Note
The last three of the functions listed are registered by a WinCC system, and automatically
repeated when the update is completed.
The steps to be performed for this scenario are described in Chapter Failure and
replacement of components during redundant operation (Page 167).
Note
Even though you have not modified the hardware configuration on the standby CPU,
there is nevertheless a master/standby changeover and the former master CPU switches
to STOP.
Supplementary information
16.12 Link-up and update sequence
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