Diagnostic LEDs

Display	LED	Meaning
	TC	TwinCAT status LED: TwinCAT is in Run mode (green). TwinCAT is in Stop mode (red). TwinCAT is in Config mode (blue).
WD	No function ex factory. The LED can be parameterized for user-specific diagnosis messages.
ERR	Lights up red when switching on. Software is being loaded. Goes off if everything is OK. The LED can be parameterized for user-specific diagnosis messages.

Display

LED

Meaning

Diagnostic LEDs 1:

TwinCAT status LED:
TwinCAT is in Run mode (green).
TwinCAT is in Stop mode (red).
TwinCAT is in Config mode (blue).

No function ex factory. The LED can be parameterized for user-specific diagnosis messages.

ERR

Lights up red when switching on. Software is being loaded. Goes off if everything is OK.

The LED can be parameterized for user-specific diagnosis messages.