
Table 7: I indications (safety capable input)
Display
I
Description
Measures
o
Input is inactive (LOW).
O
Green
Input is active (HIGH).
Ö
Green (1 Hz) in sync
with the red PWR indi‐
cation
Input is inactive (LOW) and a recoverable exter‐
nal error is present.
b
Check cabling of the flashing inputs. A short-
circuit to GND or cable break may be present.
Ö
Green (1 Hz) in sync
with the green PWR
indication
Input is active (HIGH) and a recoverable external
error is present.
b
Check cabling of the flashing inputs. A short-
circuit to 24 V or a cross-circuit to another
signal may be present.
o
LED off.
Ö
LED flashes.
O
LED illuminates.
Table 8: Q indications (safety output)
Display
Q
Description
Measures
o
Output is inactive (LOW).
O
Green
Output is active (HIGH).
Ö
Green (1 Hz) in sync
with the red PWR indi‐
cation
Output is inactive (LOW) and a recoverable exter‐
nal error is present.
b
Check cabling of the flashing outputs. A short-
circuit to GND or a cross-circuit between out‐
puts may be present.
b
If all indicators of the configured outputs are
flashing, check the supply voltage of the A1
and A2 terminals.
Ö
Green (1 Hz) in sync
with the green PWR
indication
Output is active (HIGH) and a recoverable exter‐
nal error is present.
b
Check cabling of the flashing outputs. A short-
circuit to 24 V or a cross-circuit between out‐
puts may be present.
o
LED off.
Ö
LED flashes.
O
LED illuminates.
Complementary information
The input and output indicators display the status of the terminals with a refresh rate of
approx. 50 ms.
Further topics
•
10.2
Possible faults
Important information
NOTE
If a fault response can result in an undesired valid status, you should evaluate the
associated status bits in the logic to initiate suitable measures.
Possible faults and their causes
Table 9: Faults in the logic
Fault
Responses
Causes
Voltage supply A1 / A2
of the main module is
lower than the operat‐
ing range
•
Safety controller switches to the
No supply voltage
status
•
Voltage supply
module status bit =
0
•
Status indicators are off
•
Fault in the voltage supply
•
Line break
•
Interruption due to a fuse
TROUBLESHOOTING
10
8024583/2020-11-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | Flexi IO XTDO1
27
Subject to change without notice