Step A: Changing The Cpu Parameters Offline - Siemens SIMATIC S7-400H Manual

Initial situation
The fault-tolerant system is working in the Redundant system mode.
Procedure
To change the CPU parameters of a fault-tolerant system the steps listed below
are to be performed. Details of each step are listed in a subsection.
Step
A Changing the CPU Parameters Offline
B Stopping the Standby CPU
C Loading modified CPU parameters in the standby CPU
D Switch to CPU with modified configuration
E Transition to the Redundant System Mode
10.6.1

Step A: Changing the CPU Parameters Offline

Initial situation
The fault-tolerant system is working in the Redundant system mode.
Procedure
1. Change the desired properties of the CPU offline in the hardware
configuration.
2. Compile the new hardware configuration, but do not load it into the PLC yet.
Result
The modified hardware configuration is in the PG/ES. The PLC continues to work
with the old configuration in the Redundant system mode.
10.6.2 Step B: Stopping the Standby CPU
Initial situation
The fault-tolerant system is working in the Redundant system mode.
S7-400H Programmable Controller Fault-Tolerant Systems
A5E00068197-04
Modifications to the System while in Operation
What Has To Be Done? Refer to Section
10.6.1
10.6.2
10.6.3
10.6.4
10.6.5
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