Siemens Simatic S7-1500R - Page 225

If the maximum cycle time is exceeded for a second time in the same cycle, the redundant
system responds as described in the column "2nd time cycle time is exceeded". The
redundant system then resets the cycle time monitoring.
If the maximum cycle time is exceeded for a third time in the same cycle, the redundant
system responds as described in the column "3rd time cycle time is exceeded". The redundant
system then resets the cycle time monitoring (only when time error OB80 is configured).
Table 9-4Response of S7-1500R/H redundant system when cycle time is exceeded, without OB80
Initial situation 1st time cycle time is exceeded 2nd time cycle time is exceeded
System Primary CPU Backup CPU System Primary CPU Backup CPU System Primary CPU Backup CPU
RUN-Solo RUN STOP STOP STOP STOP --- --- ---
SYNCUP
1)
RUN-Syncup SYNCUP STOP STOP STOP --- --- ---
SYNCUP
2)
RUN-Syncup SYNCUP RUN-Solo RUN STOP STOP STOP STOP
RUN-
Redundant
RUN-Redund
ant
RUN-Redund
ant
RUN-Solo RUN STOP STOP STOP STOP
1)
SYNCUP until snapshot of the work memory contents
2)
SYNCUP after snapshot of the work memory contents
Table 9-5Response of S7‑1500R/H redundant system when cycle time is exceeded with OB80
Initial situation 1st time cycle time is
exceeded
2nd time cycle time is
exceeded
3rd time cycle time is
exceeded
System Primary
CPU
Backup
CPU
System Primary
CPU
Backup
CPU
System Primary
CPU
Backup
CPU
System Primary
CPU
Backup
CPU
RUN-
Solo
RUN STOP RUN-
Solo
RUN
+ OB80
STOP STOP STOP STOP --- --- ---
SYNCUP
1)
RUN-Syn
cup
SYNCUP SYNCUP RUN-Syn
cup
+ OB80
SYNCUP STOP STOP STOP --- --- ---
SYNCUP
2)
RUN-Syn
cup
SYNCUP SYNCUP RUN-Syn
cup
+ OB80
SYNCUP
+ OB80
RUN-
Solo
RUN
+ OB80
STOP STOP STOP STOP
RUN-
Redund
ant
RUN-
Redund
ant
RUN-
Redund
ant
RUN-
Redund
ant
RUN-
Redund
ant
+ OB80
RUN-
Redund
ant
+ OB80
RUN-
Solo
RUN
+ OB80
STOP STOP STOP STOP
1)
SYNCUP until snapshot of the work memory contents
2)
SYNCUP after snapshot of the work memory contents
Assignment between event source and OBs
The type of OB determines where you assign OB to event source:
•
For hardware interrupts: Assignment in hardware configuration
•
For all other OB types: Assignment when the OB is created, where applicable after you
have configured the event source
225
Basics of program execution
9.3 Events and OBs
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD