Status And Error Display Of The Cpu - Siemens SIMATIC S7-1500 Manual

4.1.2

Status and error display of the CPU

Meaning of the RUN/STOP, ERROR and MAINT LEDs
The SIMATIC Drive Controller has three LEDs for displaying the current operating state and
the diagnostics status of the CPU. The following table shows the meaning of the various
combinations of colors for the RUN/STOP, ERROR and MAINT LEDs.
Table 4- 1
RUN/STOP LED
LED lit green
LED lit green
LED lit green
LED lit green
LED lit yellow
LED lit yellow
LED lit yellow
LED lit yellow
LED flashes yel-
SIMATIC Drive Controller
Equipment Manual, 11/2019, A5E46600370-AA
Interrupts, diagnostics alarms, error messages and system alarms
Meaning of the LEDs
ERROR LED
LED off LED off
LED off
LED flashes red
LED off
LED flashes red
LED off
LED off
LED off
LED off
LED flashes red
LED lit red
LED off
low
MAINT LED
Missing or insufficient supply voltage on
the CPU.
LED off
An error has occurred.
LED off
CPU is in RUN mode.
LED off
A diagnostics event is pending.
LED off
Service data backup in RUN ended with
error.
Maintenance demanded for the plant.
LED lit yellow The affected hardware must be
checked/replaced within a short period of
time.
Active Force job
PROFIenergy pause
Maintenance required for the plant.
The affected hardware must be
LED flashes yel-
checked/replaced within a foreseeable
low
period of time.
Bad configuration
Firmware update successfully complet-
ed.
LED flashes yel-
low
CPU is in STOP mode.
LED off
The program on the SIMATIC memory
card is causing an error.
LED flashes yel-
CPU defective
low
Update of an incompatible SINAMICS
Integrated firmware was refused.
LED lit yellow
CPU is performing internal activities
during STOP, e.g. startup after STOP.
LED off
CPU stores service data
Download of the user program from the
SIMATIC memory card
4.1 Status and error displays
Meaning
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