9.2
Status indicator (LED)
Status indicator (LED)
Table 5: Fault indicators and operational statuses
LED
Status
Possible cause
PWR
o
No supply voltage
All LEDs
Ö
All colors
Initialization with LED test
PWR
O
Green
No fault
PWR
Ö
green (1 Hz)
The Flexi Loop parameters to be monitored are
read in.
PWR
Ö
Red (2 Hz)
•
Supply voltage too low temporarily or per‐
manently
•
Internal error
PWR
Ö
Red (1 Hz)
Configuration is invalid
PWR
Ö
Red/green
Error
Additional LEDs flash for accurate diagnosis.
OUT
o
Enabling current paths open
OUT
O
Green
Enabling current paths closed
OUT
Ö
green (1 Hz)
Error in enabling current path
S1
O
Green
Reset pushbutton actuated, N/C contact of the
actuator closed
I1
o
•
Flexi Loop is not initialized yet.
•
The Flexi Loop series connection requested
the safety function
I1
O
green
Flexi Loop is initialized and closing the ena‐
bling current paths is possible.
I2
Ö
green (1 Hz)
Flexi Loop safe series connection is not in
operation and a recoverable external error is
present.
b
Check the cabling.
b
Check the number and type of Flexi Loop
nodes.
I2
Ö
green (2 × flashing
every 2 s)
Flexi Loop safe series connection is being ini‐
tialized.
I2
O
green
Flexi Loop is initialized.
Y1
o
Enabling current paths closed
Y1
O
Green
Enabling current paths open
Y2
o
Output with LOW status
Y2
Ö
Green
Reset required
Y2
O
Green
Reset pushbutton actuated
Complementary information
•
9
TROUBLESHOOTING
26
O P E R A T I N G I N S T R U C T I O N S | ReLy LOOP1
8024311/2021-07-30 | SICK
Subject to change without notice