Balluff BCS Q40BBAA-PIM20C-EP-GS04 Series, Configuration Manual, Page: 164 / 172

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7.6 LED Meaning and Configuration
7.6.1 Description
The device has 2 LEDs:
– The device status indicator (green LED) lights up
continuously during normal operation.
– The switching status indicator (yellow LED) indicates
actuation (object/medium detected).
– Other states are indicated by flashing.
The current display pattern results from various status
signals. The signal with the highest priority is displayed.
The signals are listed in descending priority.
Name Signal Meaning
Device Discovery Green-yellow, flashing (with long pause). The Device Discovery can be activated
via a system command to find the device
again.
100 ms 100 ms 100 ms 100 ms 600 ms
GN
YE
Short Circuit Pin 2 / Pin 4 Green, fast flashing. Short circuit at pin 2 or pin 4
Failure
100 ms 100 ms 100 ms 100 ms 100 ms 100 ms 100 ms 100 ms 100 ms 100 ms
GN
YE
General error
Teach-in No Object The device is currently in teach-in mode,
but no object is visible. Teaching is not
possible.
Teach-in Green-yellow flashing. The device is currently in teach-in mode.
500 ms 500 ms
GN
YE
Function Display Green depending on device state, yellow static and
shows switching state.
The object was detected / the switching
point is active.
GN state-dependent
YE static
Communication Green flashing, yellow depending on switching
state.
IO-Link communication is active. The
device is ready.
900 ms 100 ms
GN
YE state-dependent
Ready Green static, yellow depending on switching state. The device is ready.
GN static
YE state-dependent
Tab. 7-18: Meaning of the LED states
7
System Functions (continued)
BCS Q40BBAA-PIM20C-EP _ _ _ -GS04
Capacitive Proximity Switches