Diagnostics Via Led Display - Festo CTEU-CO Manual, Functions And Maintenance

2. Diagnosis
2.2

Diagnostics via LED display

2-4
LEDs are located on the bus node for diagnosing the bus
node and any connected devices (see Fig. 2/2).
The LEDs can assume the following states (sometimes in
different colours):
illuminates flashes off
Festo P.BE-CTEU-CO-OP+MAINT-EN en 1101NH