Significance Of The Led Statuses - Festo CPX Manual Del Usuario

2.1 Significance of the LED statuses

LED Behaviour and significance
PS Illuminated green: Supply voltage PS OK
Flashes green: Undervoltage
Off: No or too little supply voltage
PL Illuminated green: Supply voltage PL OK
Flashes green: Undervoltage
Off: PL not on hand or unused
P
Off: CPX communication OK
Red: CPX starting or CPX error
X1...X4 Illuminates green: Device OK
Flashes green: Diagnostics
Illuminated red: I-port error
Flashes red: Configuration error
Off: No device detected
Festo CPX-CTEL-Z6 1411a English 17