Diagnostic LEDs
The four green RUN LEDs and the four red Error LEDs indicate the operating states of the terminal channels.
Meaning of the LED displays
LED | Color | Channel | State | |
|---|---|---|---|---|
on | off | |||
Run1 | green | 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. |
Run2 | 2 | |||
Run3 | 3 | |||
Run4 | 4 | |||
Error1 | red | 1 | Channel current greater than 20.8 mA | normal operation |
Error2 | 2 | |||
Error3 | 3 | |||
Error4 | 4 | |||