System And Operating State Transitions - Siemens SIMATIC S7-1500 System Manual

Commissioning
12.4 Operating and system states
Cause of SYNCUP abort
Primary CPU or backup CPU goes into STOP operating state.
PROFINET ring interrupted
In the PROFINET ring, in addition to the two CPUs, there are
other devices with the media redundancy role "Manager" or
"Manager (auto)".
In a configuration with PROFINET rings (R1), the backup CPU
is assigned the media redundancy role "Not device in the
ring" before the SYNCUP.
Supply voltage of the primary or backup CPU has failed.
Simultaneous POWER OFF / POWER ON switching at both
CPUs during SYNCUP:
If you switch both CPUs POWER OFF/ON at the same time
during SYNCUP, SYNCUP will be aborted.
12.4.7

System and operating state transitions

System state transitions
The following figure shows the system state transitions of the redundant S7-1500R/H system.
Figure 12-9 System state transitions
400
Solution
Switch the primary CPU or backup CPU into RUN operating
state.
Replace defective PROFINET cables or PROFINET devices in
the PROFINET ring.
Configure the media redundancy role "Client" for all other
devices in the PROFINET ring.
Delete the SIMATIC Memory Card of the backup CPU.
Restore the supply voltage. Replace any defective system
power/load current supply (PS/PM).
Switch both CPUs POWER OFF/ON again. The SYNCUP is
executed again.
System Manual, 01/2024, A5E41814787-AF
S7-1500R/H redundant system