ST950S Plus+ Installation and Commissioning Manual
The RAG node has three LEDs which are used to indicate various conditions as follows. Conditions
other than those identified should not occur and so can be treated as faults.
Figure 43. RAG Node Status LEDs
Table 33. RAG Node LED Indicators
LED
Illumination
Function
Slow Flash
Software is operating
normally (typically flash
ing once per second)
Run (Blue)
Off
The node has detected a per
sistent fatal error and has
entered a non-operational
state to prevent continual
restarts (with Comms LED off
and Fault LED illuminated).
On
(Flashing rapidly)
Indicates that normal communi
cations to the CIC is occurring
On
(Flashing slowly)
Indicates abnormal communi
cations e.g. one of the D+/D-
pair is not connected. Please
fix and power cycle the node.
Comms (Blue)
Off
No relevant messages re
ceived in the last second (im
plies loss of communications)
Fault (Red)
On
Fault is registered. The fault
could be either internal or ex
ternal e.g. from LED Aspect.
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