5.4.5.5 Status of the Life LED (life lamp)
The life LED is a green LED on the lower board of the controller (for details see chapter Status LEDs) and
shows its status. The life LED can be directly addressed by the application in the process image and is used to
distinguish between certain operating states. The following table shows the connections:
No. Function Signal pattern of the Life LED Signal
1 Only firmware is in operation - without
application
t/[s]
Periodically 0.2 s off and 3 s on.
2 Examples for Life LED in the
application
Initialisation after switching on
t/[s]
Periodically 0.1 s on and 0.3 s off.
Normal operation
t/[s]
Periodically 0.2 s on and 0.2 s off.
If the life LED is not programmed in the application, its status is random: It is either continuously on or off.
However, in order to recognise whether the controller is working properly or whether an application is being
executed, a life LED (life lamp) with a fixed periodic signal should therefore always be programmed in the
application.
The process variable LIFE_LED for addressing using CODESYS and the associated IEC address in the
process image can be found in the controller configuration using the following path:
Controller configuration → GLT3010_V2 → System → System state → Life_LED
Example "Normal Operation" in CFC:
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