4 Maintenance
31
ESR5-BWS-31-24VDC
11/23 MN049020EN Eaton.com
4.3 Diagnostics
4.3.1 General states
Table 1
Diagnostics - general states
4.3.2 Error Messages
Table 2
Diagnostics - error messages
→
Plausibility errors are cleared when the supply voltage is
switched off (power-down reset).
→
If an error or fault scenario that is not listed occurs, please con-
tact Eaton through
Eaton.com/contact.
LED
State
Remark
Power
K1
K2
●
○
○
All relays are not actuated. The sensor circuit is
inactive.
-
Only channel 1 or channel 2 of the sensor circuit
is active.
-
The sensor circuit is active.
Relays K1 and K2 are ready to start and wait for
reset/start command (S34).
Possible error see error
messages.
●
●
●
The sensor circuit is active.
All relays are energized.
-
Legend:
○
– LED o
ff
,
●
– LED on
LED
State
Possible cause
Remedy
Power
K1
K2
○
○
○
The sensor circuits are active.
No supply voltage or undervoltage at A1/A2.
Check the supply voltage
●
○
○
The sensor circuit is being
actively driven, but the input
LEDs is not lit.
Possible short circuit in sensor circuit
between S12 and S22. The module does not
detect the error (e.g., when using light
curtains).
Turn off the operating voltage and fix the
cross-fault. Then carry out a functional
test.
The sensor circuit is active. The
reset/start circuit (S34) is/was
activated. The safety circuit (K1
and K2) does not pick up
External error: The read-back contact
(external actuator) in the reset circuit is
open.
Internal error:
1. the diagnostic contact is not working
correctly.
2. one NO contact is welded.
External error: Check the actuator. Internal
error: Power down reset with subsequent
test of the safety function (function test).
If the error occurs again after the
function test, please replace the
device.