MS Meaning
Gr
een (1 Hz)
A downstream Flexi Loop node has shut down or a discrepancy or
seq
uence error has occurred on a downstream Flexi Loop node.
Gr
een (0.5 Hz)
Connection to Flexi Loop communication driver (e.g., Fle
xi Soft) exists but
communication with the safe sensor cascade has been interrupted.
Or:
More than 32 Flexi Loop nodes connected to a line.
Gr
een (2 Hz)
Initialization phase, establishing communication.
Gr
een (1 Hz)
Communication interrupted, no connection to the Flexi Loop communica‐
tion dr
iver (e.g. Flexi Soft)
R
ed/green
(2 Hz)
Configuration error
•
T
oo many or too few nodes are connected to the safe sensor cas‐
cade.
Or:
•
This node is no
t configured in this location (incorrect type or incor‐
rect number).
R
ed (1 Hz)
An error has occurred at this Flexi Loop node. The nature of the error is
indicat
ed by the combination of EMSS LEDs or OSSD-LEDs (see "LEDs of
the EMSS Flexi Loop nodes", page 71 or see "LEDs of the OSSD Flexi
Loop nodes", page 72).
R
ed (2 Hz)
A critical error has occurred on a downstream node.
R
ed
A critical error occurred on this node. The error can under certain circum‐
s
tances be cleared by switching off and on again.
Table 29: Displays of the MS LEDs
Large distances can be covered using the safe sensor cascade. For this reason the
f
lashing of the MS LEDs indicates the direction in which it is necessary to go from the
controller to reach the Flexi Loop node on which the shutdown or the error occurred.
NOTE
St
art at the control cabinet and head toward the terminator until you find the Flexi Loop
node whose LED is no longer flashing green at a frequency of 1 Hz.
Figure 60: Direction indication on the MS LEDs
1
I LED on the Flexi Soft
2
MS LEDs of the Flexi Loop nodes
3
Direction of propagation to the shutdown
4
Flexi Loop node with shutdown
9 TROUBLESHOOTING
70
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
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