Product overview
2.6 Mode selector
CPU 1517H-3 PN (6ES7517-3HP00-0AB0)
24
Equipment Manual, 11/2019, A5E42011886-AB
2.6
Mode selector
You use the mode selector to:
●
Request a change to a specific operating state
●
Disable or enable the change of a specific operating state
(if, for example, the mode selector is set to STOP, you cannot switch the CPU to RUN via
a communication task configured in the TIA Portal or via the display)
The following table shows the position of the switch and the corresponding meaning.
Table 2- 1
Mode switch settings
Position
Meaning
Explanation
RUN
RUN operating state
The CPU has permission to go to RUN.
STOP
STOP operating state
The CPU does not have permission to go to RUN.
MRES
Memory reset
Position for CPU memory reset.
Reference
You can find a brief overview of the various operating states and system states in the section
Status and error display of the CPU (Page 29).
You can find a detailed description of the operating states and system states in the system
manual for S7-1500R/H Redundant System
https://support.industry.siemens.com/cs/ww/en/view/109754833