Commissioning
9.4 Operating and system states
S7-1500R/H redundant system
222
System Manual, 10/2018, A5E41814787-AA
⑥
SYNCUP → RUN
-Redundant, RUN-
Syncup → RUN
-Redundant
Transition
Description
Effects
System state
transition
SYNCUP → RUN
-Redundant
The redundant system switches from SYNCUP to the RUN-Redundant sys-
tem state if SYNCUP has successfully run.
In the RUN-Redundant system state, the two CPUs execute the user pro-
gram synchronously.
Note: A temporary increase in the cycle time can occur upon a system state
transition SYNCUP
→ RUN
-Redundant. Configure a sufficiently long maxi-
mum cycle time for the CPUs.
This system state tran-
sition does not have
any effect on data.
Operating state
transitions
RUN-
Syncup →
RUN-Redundant
The primary CPU switches from the RUN-Syncup operating state to the
RUN-Redundant operating state if SYNCUP has successfully run.
Communication con-
nections (HMI, PG/PC)
on the backup CPU
become available.
Both CPUs process the
user program synchro-
nously.
SYNCUP → RUN
-Redundant
The backup CPU switches from the SYNCUP operating state to the RUN-
Redundant operating state if SYNCUP has successfully run.
⑦
RUN-
Redundant → RUN
-Solo, RUN-
Redundant → RUN
Transition
Description
Effects
System state
transition
RUN-
Redundant → RUN
-Solo
The redundant system switches from the RUN-Redundant system state to
the RUN-Solo system state (loss of redundancy) if:
•
You POWER OFF one of the CPUs.
or
•
A CPU detects an error that prevents continued processing, for example
a hardware defect
or
•
You set one of the CPUs to STOP with the PG/PC, the display or the
mode selector.
The primary CPU switches to RUN or the backup CPU becomes the primary
CPU and switches to RUN.
This system state tran-
sition has effects on
the diagnostics data.
Operating state
transition
RUN-Redundant
→ RUN
The primary CPU switches from the RUN-Redundant operating state to the
RUN operating state and continues to execute the user program.
This operating state
transition does not
have any effect on
data.
Содержание Simatic S7-1500H
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