Siemens Simatic S7-1500R - Page 279

You can find a detailed list of the causes of error and remedies in the table SYNCUP abort:
Causes and solutions.
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Figure 11-8SYNCUP system state aborts
Table 11-12Sequence of events: SYNCUP aborts
No. in
diagram
Primary CPU System state Backup CPU
Initial situation: The S7-1500R/H redundant system is in the SYNCUP system state. An error occurs in the backup CPU.
①
The CPU does not switch from the RUN-Syncup
operating state to RUN-Redundant, but instead
returns to RUN and continues to execute the
user program.
SYNCUP → RUN-Solo If SYNCUP aborts, the backup
CPU may restart and then switch
to the STOP operating state. The
backup CPU is ready for a new
SYNCUP.
Procedure for error correction
1.
Eliminate the error.
2.
Switch the backup CPU from STOP to RUN.
The backup CPU switches from STOP to the SYNCUP operating state. Synchronization restarts.
279
Commissioning
11.4 Operating and system states
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD