Operating State Transitions - Siemens SIMATIC S7-1500 System Manual

Additional information
You can find additional information on cycle and response times in the Cycle and Response
Times (https://support.industry.siemens.com/cs/ww/en/view/59193558) function manual.
11.4.5

Operating state transitions

Operating states and operating state transitions
The figure below shows the operating state and operating state transitions:
Figure 11-2
The table below shows the effects of operating state transitions:
Table 11- 1 Operating state transitions
No. Operating state transitions
①
POWER ON →
STARTUP
②
POWER ON →
STOP
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
Operating states and operating state transitions
After switching on, the CPU switches to "STARTUP" if:
The hardware configuration and program blocks are
•
consistent.
Startup type "Warm restart - RUN" is set.
•
or
Startup type "Warm restart mode before POWER
•
OFF" is set and the CPU was in RUN mode before
POWER OFF.
After switching on, the CPU switches to "STOP" if:
The hardware configuration and program blocks are
•
inconsistent.
or
Startup type "No restart" is set.
•
or
Startup type "Warm restart mode before POWER
•
OFF" is set and the CPU was in STOP mode before
POWER OFF.
Commissioning
11.4 Operating states of the CPU
Effects
The CPU clears the non-retentive
memory, and resets the content
of non-retentive DBs to the start
values of the load memory. Re-
tentive memory and retentive DB
content are retained.
The 500 most recent entries are
retained in the diagnostics buffer.
The CPU clears the non-retentive
memory, and resets the content
of non-retentive DBs to the start
values of the load memory. Re-
tentive memory and retentive DB
content are retained.
The 500 most recent entries are
retained in the diagnostics buffer.
201