MS
Meaning
Green (1 Hz)
A downstream Flexi Loop node has shut down or a discrepancy or
sequence error has occurred on a downstream Flexi Loop node.
Green (0.5 Hz)
Connection to Flexi Loop communication driver (e.g.,
Flexi Soft) exists but
communication with the safe sensor cascade has been interrupted.
Or:
More than 32 Flexi Loop nodes connected to a line.
Green (2 Hz)
Initialization phase, establishing communication.
Green (1 Hz)
Communication interrupted, no connection to the Flexi Loop communica‐
tion driver (e.g. Flexi Soft)
Red/green
(2 Hz)
Configuration error
•
Too many or too few nodes are connected to the safe sensor cas‐
cade.
Or:
•
This node is not configured in this location (incorrect type or incor‐
rect number).
Red (1 Hz)
An error has occurred at this Flexi Loop node. The nature of the error is
indicated by the combination of EMSS LEDs or OSSD-LEDs (
the EMSS Flexi Loop nodes", page 71
).
Red (2 Hz)
A critical error has occurred on a downstream node.
Red
A critical error occurred on this node. The error can under certain circum‐
stances 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
flashing 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
Start 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
