ABB Relion RES670, Technical Manual

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acknowledgment has been performed on a higher priority signal. The low priority
signal will be shown as acknowledged when the high priority signal resets.
Activating
signal RED
LED
Acknow
IEC09000313_1_en.vsd
Activating
signal GREEN
R
R G
IEC09000313 V1 EN-US
Figure 18: Operating Sequence 3 (LatchedAck-F-S), 2 colors involved
GUID-A652A49D-F016-472D-8D38-6D3E75DAB1DB v3
If all three signals are activated the order of priority is still maintained.
Acknowledgment of indications with higher priority will acknowledge also low
priority indications, which are not visible according to figure
19 .
Activating
signal RED
LED
Acknow.
IEC09000314-1-en.vsd
Activating
signal YELLOW
G
Y R
R Y
Activating
signal GREEN
IEC09000314 V1 EN-US
Figure 19: Operating sequence 3, three colors involved, alternative 1
GUID-071B9EB5-A1D2-49C5-9458-4D21B7E068BE v3
If an indication with higher priority appears after acknowledgment of a lower priority
indication the high priority indication will be shown as not acknowledged according to
figure
20 .
Section 5
1MRK 511 408-UUS A
Local Human-Machine-Interface LHMI
94 Phasor measurement unit RES670 2.2 ANSI
Technical manual