Siemens SIMATIC S7-1500 System Manual page 411

Commissioning
12.4 Operating and system states
⑩SYNCUP → STOP, RUN-Syncup → STOP
Transition Description
System state SYNCUP → STOP
transition
The redundant system switches from the SYNCUP system state to the STOP
system state if:
• You set the primary CPU or both CPUs to STOP with the PG/PC, the display
or the mode selector.
• SYNCUP Is aborted as a result of an error in the primary CPU or in both
CPUs.
Operating state RUN-Syncup → STOP
transitions
The primary CPU switches from the RUN-Syncup operating state to the STOP
operating state if:
• The primary CPU detects an error that prevents further processing
or
• You set the primary CPU to STOP with the PG/PC, the display or the mode
selector
or
• The redundant system processes a STOP command in the user program.
SYNCUP → STOP
The backup CPU restarts and switches to the STOP operating state after
SYNCUP aborts if:
• SYNCUP Is aborted due to an error (for causes and remedies, see SYNCUP
system state (Page 388) section)
or
• You set the CPU to STOP with the PG/PC, the display or the mode selector.
410
Effects
This system state tran-
sition does not have
any effect on data.
These operating state
transitions have no
effect on data.
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF