Siemens SIMATIC S7-1500 Operating Instructions Manual page 66

Operation of the CPU
6.2 Operating modes
No. Operating mode
④
⑤
⑥
66
Conditions
transitions
STARTUP → STOP The CPU returns from "STARTUP" mode to "STOP" mode in the follow-
ing cases:
•
•
•
STARTUP → RUN The CPU goes to the "RUN" mode in the following cases of "START-
UP":
•
•
RUN → STOP The CPU returns from "RUN" mode to "STOP" mode in the following
cases:
•
•
•
An error is detected during start-up.
The CPU is set to "STOP" from the programming device.
A STOP command is executed in the Startup OB.
The CPU has initialized the PLC tags.
The CPU has executed the startup blocks successfully.
An error is detected that prevents continued processing.
A STOP command is executed in the user program.
The CPU is set to "STOP" by the programming device or the mode
switch.
Operating Instructions, 05/2019, A5E46864285-AA
CPU 1505SP (F) Ready4Linux Version 2.7