Siemens SIMATIC S7-1500/ET 200MP System Manual page 271

Commissioning
12.5 Operating modes
No. Operating mode transitions
⑤ STARTUP → RUN
⑥ RUN → STOP
Standard, F-CPUs / compact CPUs from article number 6ES751x-xxx02-0AB0/6ES751x-1CK01-0AB0: You switch the
1)
mode using keys (RUN and STOP).
Note
RUN → STOP in configurations with centrally inserted communication modules (CM)
and/or communications processors (CPs)
Centrally inserted communications modules (CMs) and/or communications processors (CPs)
that have not yet been configured and downloaded to the CPU can cause a transition from
"RUN" mode back to "STOP" mode.
Remove unconfigured CMs/CPs or configure and download the configuration of these CMs to
the CPU before you set the CPU to "RUN" mode.
270
In the following cases, the CPU goes from "STARTUP" to
"RUN" mode when:
• The CPU has initialized the PLC tags.
• The CPU has executed the startup blocks successful-
ly.
In the following cases, the CPU goes from "RUN" mode
back to "STOP" mode:
• The CPU detects an error that prevents it from con-
tinuing to operate.
• You have inserted CMs/CPs that have not yet been
configured.
• The CPU processes a STOP command in the user
program.
• You set the CPU to "STOP" via the programming
device, display or mode selector switch / operating
mode button.
1)
Effects
Automation system
System Manual, 01/2023, A5E03461182-AK