Siemens Simatic S7-1500/ET 200MP, Системное руководство

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Commissioning
11.5 Operating modes of the CPU
Automation system
238
System Manual, 12/2017, A5E03461182-AE
11.5.4 Operating mode transitions
Operating modes and operating mode transitions
The following figure shows the operating modes and the operating mode transitions:
Figure 11-3 Operating modes and operating mode transitions
The table below shows the effects of the operating mode transitions:
Table 11- 4 Operating mode transitions
No. Operating mode transitions Effects
①
POWER ON →
STARTUP
After switching on, the CPU switches to "STARTUP"
mode 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.
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
contents are retained.
The 500 newest entries in the
diagnostics buffer are retained.
② POWER ON →
STOP
After switching on, the CPU goes to "STOP" mode 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.
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
contents are retained.
The 500 newest entries in the
diagnostics buffer are retained.