Node LEDs 1 to 32
MS LED
Meaning
Red/green (2 Hz)
Red/green (2 Hz)
Node found, but does not correspond to the
configured type or the number of nodes config‐
ured has been exceeded.
Red (2 Hz)
Red/green (2 Hz)
Configured node not found
Red/green (1 Hz)
Green (0.5 Hz)
Node found, but safe sensor cascade inter‐
rupted (cable break detected).
If multiple LEDs are flashing: The connection
has probably been interrupted downstream of
the Flexi Loop node whose LED is the last one
flashing.
Red (node 1)
Green (0.5 Hz)
Number of Flexi Loop nodes allowed not
reached
Red (node 32)
Green (0.5 Hz)
Number of Flexi Loop nodes allowed exceeded
Table 39: Node LEDs of the MSTR1 and MSTR2 Flexi Loop accessory
Operating mode LED
Meaning
No operating voltage, or voltage too low
Green
Compatible safety controller detected, safe sensor cascade in
operation
Orange
Safety controller found, compatibility test in progress
Red
No safety controller found
Red
Configuration required
Red/green
Configuration process in progress, please wait
Green
Configuration saved successfully, reboot required
Table 40: Operating mode LED of the MSTR1 and MSTR2 Flexi Loop accessories
9.3.6
LEDs of the MSTR2 Flexi Loop accessory
Figure 65: LEDs of the MSTR2 Flexi Loop accessory
1
Node LEDs 1 to 32
2
Operating mode LED
3
IO-Link LED
Node LEDs 1 to 32
MS LED
Meaning
–
Node not found (not connected, not in opera‐
tion)
Green
–
OSSD or EMSS in the ON state
Green
–
OSSD or EMSS in the OFF state
Table 41: Node LEDs of the MSTR1 and MSTR2 Flexi Loop accessory
9
TROUBLESHOOTING
74
O P E R A T I N G I N S T R U C T I O N S | Flexi Loop
8015836/YT10/2016-05-24 | SICK
Subject to change without notice