Pcs 7, Step 2: Offline Modification Of The Hardware Configuration; Pcs 7, Step 3: Stopping The Reserve Cpu - Siemens SIMATIC S7-400H System Manual

System modifications during operation
17.3 Adding components in PCS 7
17.3.2

PCS 7, step 2: Offline modification of the hardware configuration

Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. Perform all the modifications to the hardware configuration relating to the added
2. Compile the new hardware configuration, but do not load it into the target system just yet.
Result
The modified hardware configuration is in the PG/ES. The target system continues operation
with the old configuration in redundant system mode.
Configuring connections
The interconnections with added CPs must be configured on both connection partners after
you complete the HW modification.
17.3.3

PCS 7, step 3: Stopping the reserve CPU

Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. In SIMATIC Manager, select a CPU of the fault-tolerant system, then choose "PLC >
2. In the "Operating Mode" dialog box, select the reserve CPU, then click "Stop".
Result
The reserve CPU switches to STOP mode, the master CPU remains in RUN mode, the fault-
tolerant system works in single mode. The one-sided I/O of the reserve CPU is no longer
addressed.
Although I/O access errors of the one-sided I/O will result in OB 85 being called, due to the
higher-priority CPU redundancy loss (OB 72) they will not be reported. OB 70 (I/O
redundancy loss) is not called.
288
hardware offline. Assign appropriate icons to the new channels to be used.
Operating Mode" from the menu.
System Manual, 03/2012, A5E00267695-11
S7-400H