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Chapter 6
Status Indicators
Tap Status Indicators
56
Figure 37
shows the location of the two tap indicators: one for the input device
connection and one for the link connection.
the status for each indicator.
Figure 37 - Tap Indicators
INPUT
Table 12 - Tap Indicators
Indicator
State
Solid Green
Flashing Green at 1 Hz
Input
Solid Red
Flashing Red at 1 Hz
Solid Green
Solid Red
Flashing Red at 1 Hz
Link
Off
Figure 38
shows an example with five taps. The device at Tap 3 has tripped, and
the GuardLink safety signal is in a safe state. To locate the tripped device,
follow the blinking green lights to the tap with the solid red device indicator.
The link indicator is solid red, which indicates a safe (OFF) state.
Figure 38 - Tripped Device with Solid Red Status Indicators
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
Table 12
provides a description of
Input indicator
Link indicator
Description
The input device is in the operational state with no demand on its
safety function (for example, the OSSD inputs are ON or safety
contacts are closed). The tap is also in the operational state.
The input device is in the operational state (no demand on its safety)
and the tap is in the safe state. One or more upstream taps are in a
safe state. The CLU signal is high, so all taps are in the safe state.
OSSD inputs are OFF or safety contacts are open.
The input device is in the safe state (for example, OSSD inputs are OFF
or safety contacts are open), and there are no faults with the tap.
The input device has not performed as expected; for example, both
inputs did not change simultaneously. Try cycling the input device
again. Cycle power to GuardLink circuit if necessary.
The tap is transmitting the safety signal.
GuardLink safety signal is OFF. Or terminator is missing.
Fault at tap or input device.
Correct fault and cycle power to the GuardLink system.
No communication to DG safety relay. Input is configured for OSSD/
EMSS; recheck the configuration. Input is in faulted state. Correct
fault and/or cycle power to the DG safety relay and GuardLink circuit.
Tripped
device
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