ABB Relion 670 Series RES670, Technical Manual

Page: 97 / 888

Activating
signal
LED
Acknow.
en01000231.vsd
IEC01000231 V1 EN
Figure 16: Operating Sequence 3 LatchedAck-F-S
The sequence described below is valid only if the same function block is
used for all three colour LEDs.
When an acknowledgment is performed, all indications that appear before the indication
with higher priority has been reset, will be acknowledged, independent of if the low
priority indication appeared before or after acknowledgment. In
Figure 17 it is shown the
sequence when a signal of lower priority becomes activated after 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
Figure 17: Operating Sequence 3 (LatchedAck-F-S), 2 colors involved
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 18 .
1MRK 511 365-UUS A
Section 5
Local Human-Machine-Interface LHMI
Phasor measurement unit RES670 2.1 ANSI 91
Technical manual