Operating Mode Transitions - Siemens SIMATIC S7-1500 System Manual

Commissioning
9.4 Operating modes
9.4.2

Operating mode transitions

Operating modes and operating mode transitions
The following figure shows the operating modes and the operating mode transitions:
Figure 9-2
The following table shows the conditions under which the operating modes change:
Table 9- 1
No. Operating mode
①
②
114
Operating modes and operating mode transitions
Operating mode conditions
Conditions
transitions
POWER ON → After switching on, the CPU switches to "STARTUP" mode if:
STARTUP
•
•
Non-retentive memory is cleared, and the content of non-retentive DBs
is reset to the start values of the load memory. Retentive memory and
retentive DB contents are retained.
POWER ON → STOP After switching on, the CPU goes to "STOP" mode if:
•
•
Non-retentive memory is cleared, and the content of non-retentive DBs
is reset to the start values of the load memory. Retentive memory and
retentive DB contents are retained.
The hardware configuration and program blocks are consistent.
The start-up type "Warm restart RUN" is set
or
the startup type "Warm restart operating mode before POWER
OFF" is set and was in RUN mode before POWER OFF.
The hardware configuration and program blocks are consistent
or
the "No restart" startup type is set.
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB