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④
Figure 3-6 View of the CPU 1515‑2 PN - rear
3.6
Operating mode buttons
You use the operating mode buttons to:
• Request a change to a specific operating state
• Disable or enable the change to a specific operating state
(if the operating mode button STOP is active, for example, you cannot switch the CPU to
RUN via a communication task configured in the TIA Portal or the display)
The following table shows the meaning of the corresponding operation of the operating
mode buttons.
Table 3-6 Meaning of the operating mode buttons
Operation of the operating mode but
tons
RUN
STOP
1. Press the operating mode button
STOP.
Result: The RUN/STOP LED lights up
yellow.
2. Press the operating mode button
STOP until the RUN/STOP LED lights
up for the 2nd time and remains con
tinuously lit (this takes three
seconds). After this, release the but
ton.
3. Press the operating mode button
STOP again within the next three
seconds.
CPU 1515-2 PN (6ES7515-2AN03-0AB0)
Equipment Manual, 11/2022, A5E46416198-AC
Fixing screws
Meaning
RUN mode
STOP mode
Manual memory reset
(with SIMATIC memory card
inserted)
or
Reset to factory settings
(without inserted SIMATIC
memory card)
3.6 Operating mode buttons
Explanation
The CPU has permission to go to RUN.
The CPU does not have permission to go to RUN.
The CPU is executing a memory reset.
or
The CPU is being reset to factory settings.
You can find additional information in the
S7-1500/ET 200MP system manual
(https://support.industry.siemens.
com/cs/ww/en/view/59191792).
Product overview
29
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