Operating Mode Transitions - Siemens SIMATIC ET 200SP System Manual

Commissioning
10.6 Operating modes of the CPU
Reference
Further information about cycle and response times is available in the Function Manual
Cycle and response times (http://support.automation.siemens.com/WW/view/en/59193558).
10.6.4

Operating mode transitions

Operating modes and operating mode transitions
The following figure shows the operating modes and the operating mode transitions:
Figure 10-9
The table below shows the effects of the operating mode transitions:
Table 10- 7 Operating mode transitions
No. Operating mode transitions
①
POWER ON →
STARTUP
②
POWER ON →
STOP
③
STOP → STARTUP
186
Operating modes and operating mode transitions
After switching on, the CPU switches to "STARTUP"
mode if:
The hardware configuration and program blocks are
•
consistent.
The "Warm restart-RUN" startup type is set
•
or
The "Warm restart mode before POWER OFF" is
•
set and was in RUN mode before POWER OFF.
After switching on, the CPU goes to "STOP" mode if:
The hardware configuration and program blocks are
•
inconsistent
or
The "No restart" startup type is set.
•
The CPU switches to "STARTUP" mode if:
The hardware configuration and program blocks are
•
consistent.
The programming device sets the CPU to "RUN"
•
and the mode selector is in the RUN setting
or
The mode selector is switched from STOP to RUN.
•
Effect
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 con-
tents are retained.
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 con-
tents are retained.
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 con-
tents are retained.
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF