Product overview, functions
2.7 LEDs
CP 1543-1
Operating Instructions, 05/2017, C79000-G8976-C289-07
23
The following table shows the meaning of the various combinations of colors of the RUN,
ERROR and MAINT LEDs.
Table 2- 3 Meaning of the LEDs "RUN", "ERROR", "MAINT"
No supply voltage on the CP or supply
voltage too low.
LED test during startup
Startup (booting the CP)
LED lit green
LED off
LED off
LED lit green
LED off
A diagnostics event has occurred.
Maintenance, maintenance is demand-
ed.
LED lit green
LED off
LED flashing
Maintenance is required.
Downloading the user program
LED flashing
LED off
LED off
No CP configuration exists
Loading firmware
LED flashing
LED flashing red
LED flashing
Module fault
(LEDs flashing synchronized)