Siemens SIMATIC CPU 1515SP PC2 F User Manual page 54

RUN/STOP
LED lights up
LED lights up
LED flashes
LED flashes
yellow/green
LED flashes
yellow/green
LED flashes
POWER LED
Table 9- 2
CPU 1515SP PC2 (F/T/TF)
Operating Instructions, 09/2018, A5E42603425-AA
ERROR LED
LED
LED off
yellow
LED flashes
yellow
red
LED off
yellow
LED off
LED flashes
red
LED flashes
green red
POWER LED
POWER LED
LED off
LED lights up yellow
LED green
Interrupt, error and system messages
MAINT LED
Software controller of the CPU is in the operat-
ing state STOP.
LED off
The user program is causing an error.
LED flashes
yellow
CPU is performing internal activities during
STOP, e.g. ramp-up after STOP.
LED off
Loading the user program
Startup (transition from STOP → RUN)
LED off
Startup (CPU booting)
Test of LEDs during startup, inserting a module.
LED flashes
yellow
LED flashing test
CPU defective
LED flashes
red
Meaning
No supply voltage or supply voltage too low
Supply voltage present;
running through BIOS phase;
operating system is shut down
Supply voltage present;
Booting or operation of the operating system
9.1 Status and error display
Meaning
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