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The LEDs indicate the operating and communications status of the module according to the
following scheme:
Table 2- 4
(red / green)
flashing green
flashing red
Table 2- 5
(red / green)
Detailed status schemes
flashing green
flashing green
flashing green
flashing red
SIMATIC CM 1242-5
Operating Instructions, 01/2023, C79000-G8976-C245-06
Display of the basic states of the module by the "DIAG" LED
DIAG
Meaning
Power OFF
RUN without errors
green
•
Startup
•
STOP without errors
•
No project data
•
Firmware update
Problem / error
Display schemes for detailed module statuses
DIAG
-
RUN/STOP
(yellow /
green)
green
Comment
The individual states are signaled by the
RUN/STOP and ERROR LEDs (see below).
The individual states are signaled by the
RUN/STOP and ERROR LEDs (see below).
ERROR
Meaning
(red)
RUN without errors,
Exchange of user data with DP master
•
Stopped (STOP) without errors
•
No project data available
Starting up (STOP → RUN)
Loading firmware
(The DIAG and RUN/STOP LEDs flash alternately.)
-
If a master-slave connection is established:
•
DP master CPU in STOP, "CLEAR" on PROFIBUS
or
•
Slave error
Displays and connectors
2.2 LEDs
15
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