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LEDs, connections, QR code
2.1 LEDs
The following table shows the meaning of the various LED combinations. The symbols have
the following meaning:
Table 2- 1
Table 2- 2
LEDs under the front panel
The LEDs under the front panel (Reserve) have no function.
16
Display of the LED states
LED pattern
Meaning of the LED displays
LED (green)
LED (red)
RUN
ERROR
-
LED (yellow)
MAINTENANCE
-
Operating Instructions, 12/2022, C79000-G8976-C589-01
Meaning
LED is off.
LED lights up.
LED flashes.
LED state is irrelevant.
Meaning
A diagnostic event is present
•
No supply voltage on the CP or
supply voltage too low
•
CP was reset to factory settings
LED test during startup
CP startup
CP waiting for connection to CPU
•
CP in RUN mode
•
No fault
A diagnostic event is present
Maintenance is demanded
Maintenance demanded and a
diagnostic event is present
•
Module fault (LEDs flash
synchronously)
SIMATIC CP 4163-5
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