21
2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
13. Device diagnostics
Important!
Ì
Plausibility errors are deleted when the power supply is switched off (power-down reset).
Ì
Please contact EUCHNER if an error or fault symptom that is not listed occurs.
13.1. Diagnostics via LED displays
Important!
Behavior of the IO-Link LED
Ì
In the operating state with IO-Link, the OI-Link LED flashes green while IO-Link communication is
active.
Ì
If the IO-Link LED is switched off in the operating state with IO-Link, this indicates a loss of commu-
nication. Check the IO-Link connection in this case.
13.1.1. General states
No.
Status
LEDs
State
DIA
red
PWR
green
STATE 1
green
STATE 2
green
K1/K2
green
IO-Link
green
1
PowerUp
5 Hz
Device booting.
2
Ready
X
All relays not controlled.
All sensor circuits are off.
Long ON,
short OFF
X
All relays not controlled.
Sensor circuit 2 is off.
Long ON,
short OFF
X
All relays not controlled.
Sensor circuit 1 is off.
3
Ready for switch-
ing on
Long ON,
short OFF
Long ON,
short OFF
X
One or both sensor circuits (S1 and S2) is or are active.
Relays K1 and K2 are ready to start and waiting for a start
command.
4
Safety outputs
On
X
The sensor circuits are active. All relays have picked up.
Key:
LED off
LED illuminated
5 Hz
LED flashes at 5 Hz
X
State-dependent