Siemens S7-1200 PROFIBUS - Leds

Displays and connectors
2.2 LEDs
SIMATIC CM 1242-5
14 Operating Instructions, 01/2023, C79000-G8976-C245-06
2.2 LEDs
LEDs of the module
The module has various LEDs for displaying the status:
• LED on the front panel
The "DIAG" LED that is always visible shows the basic statuses of the module.
Table 2- 1 LED on the front panel
LED / colors
Name
Meaning
red / green
DIAG
Display of the basic status of the module
• LEDs below the upper cover of the housing
Open the upper housing cover. The LEDs here provide more detailed information on the
module status.
Table 2- 2 LEDs below the upper cover of the housing
LED / colors
Name
Meaning
yellow / green
RUN/STOP
Details on the operational and communications status of the
module
red
ERROR
Group error
- not used -
-
- not used -
-
Note
LED colors when the module starts up
When the module starts up, all its LEDs are lit for a short time. Multicolored LEDs display a
color mixture. At this point in time, the color of the LEDs is not clear.
Display of the operating and communication status
The LED symbols in the following tables have the following significance:
Table 2- 3 Meaning of the LED symbols
Symbol
-
LED status
OFF
ON (steady light)
Flashing, one color
Flashing yellow-
green
Not relevant