LEDs on the basic CPU module

Display

LED

Meaning

LEDs on the basic CPU module 1:

PWR

Power supply. The Power LED comes on when the device is connected to a live power supply unit (green).

TC

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

HDD

Read/Write CFast card (red). Indicates access to the CFast card.

FB1

Status LED for optional interface (the function is described in the documentation for the respective optional interface).

FB2

Status LED for optional interface (the function is described in the documentation for the respective optional interface).