Pcs 7, Step Vi: Transition To Redundant State - Siemens SIMATIC S7-400H System Manual

System modifications in operation
14.4 Removing components in PCS 7
14.4.6

PCS 7, step VI: Transition to redundant state

Starting situation
The fault-tolerant system is operating with the new hardware configuration in single mode.
Procedure
1. In SIMATIC Manager, select a CPU of the fault-tolerant system, then choose "PLC >
2. From the "Operating Mode" dialog box, select the standby CPU, then click "Warm Restart".
Result
The standby CPU links up and is updated. The fault-tolerant system is operating with the
new hardware configuration in redundant mode.
Reaction of the I/O
Type of I/O
I/O modules to be
removed
I/O modules still
present
DP stations to be
removed
No longer included in the hardware configuration, but still plugged in.
1)
Central modules are first reset. Output modules briefly output 0 during this time (instead of the
2)
configured substitute or hold values).
Reaction to monitoring timeout
If one of the monitored times exceeds the configured maximum the update is aborted. The
fault-tolerant system remains in single mode with the previous master CPU and, assuming
certain conditions are met, attempts to the link-up and update later. For further information,
refer to section Time monitoring (Page 106).
216
Operating Mode" from the menu.
One-sided I/O of standby
CPU
are no longer addressed by the CPU.
1)
Driver blocks are no longer present.
are given new parameter
settings
by the CPU.
as for I/O modules to be removed (see above)
One-sided I/O of master
CPU
continue operation without interruption.
and updated
2)
Switched I/O
System Manual, 09/2007, A5E00267695-03
S7-400H