Siemens CM 1542-1 - LEDs; Module LED Status Indicators

CM 1542-1
Operating Instructions, 07/2019, C79000-G8976-C355-04
19
LEDs
2
①
RUN/STOP
②
ERROR
③
MAINT
④
X1 P1 LINK/ACT
⑤
X1 P2 LINK/ACT
Figure 2-1 LED display of the CM 1542-1 (without front cover)
Meaning of the LED displays
The CM 1542-1 has 3 LEDs to display the current operating status and the diagnostics
status and these have the following meanings:
● RUN/STOP (single color green)
● ERROR (single color red)
● MAINT (single color yellow)
The following table shows the meaning of the various combinations of colors of the RUN,
ERROR and MAINT LEDs.
Table 2- 1 Meaning of the LEDs
RUN/STOP
ERROR
MAINT
Meaning
LED off
LED off
LED off
No supply voltage on the CM or
supply voltage too low
LED lit green
LED lit red
LED lit yellow
LED test during startup