Festo CPX-E-4IOL Series Translation Of The Original Instructions page 11

Function
IO-Link mode (IOL) [X0] ... [X3]
LED Meaning
(green)
No IO-Link communication exists
Off
Tab. 9 IO-Link mode (IOL) [X0] ... [X3]
Standard IO mode (SIO) [X0] ... [X3]
LED Meaning
(yellow)
Process signal = 1
Lit
Process signal = 0
Off
Tab. 10 Standard IO mode (SIO) [X0] ... [X3]
Load voltage supply U
LED Meaning
(green)
Load voltage supply U
Lit
Undervoltage of the load voltage supply
U on at least one device
OUT
Flashes
Load voltage supply U
undervoltage
Off
Tab. 11 Load voltage supply [PL]
Festo — CPX-E-4IOL-... — 2020-01a
[PL]
OUT
exists
OUT
not present or
OUT
Remedy
–
Remedy
–
–
Remedy
–
Check the load voltage supply U .
OUT
11