Diagnostic LEDs
The four green RUN LEDs indicated the operating state of the terminal channels.
Meaning of the LED displays
LED | Color | Channel | State | |
|---|---|---|---|---|
on | off | |||
Run IN 1 | green | Input 1 | normal operation | A watchdog-timer overflow has occurred. The green LEDs go out if no process data are transferred between the controller and the Bus Coupler for more than 100 ms. |
Run IN 2 | Input 2 | |||
Run OUT 1 | Output 1 | |||
Run OUT 2 | Output 2 | |||