Diagnostic LEDs

PWR

Power supply
The power LED lights green if the device is connected to a power supply unit and the unit is switched on.

Bootloader is started and runs without errors (the colors red and yellow light up for one second).

TC

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

Error or crash of the PLC (yellow). Applies only to TwinCAT 3

HDD

Read/Write CFast card
(red) indicates that access to the CFast card is in progress.

FB1

Status LED1 for fieldbus (the function is described under the fieldbus interface)

FB2

Status LED2 for fieldbus (the function is described under the fieldbus interface)