ABB REG650 Technical Manual page 63

1MRK 502 034-UEN -
Technical Manual
the signal is not present any more. If the signal is still present after
acknowledgment it gets a steady light.
Activating
signal
LED
Acknow.
IEC01000231 V1 EN
Figure 17: Operating sequence 3 (LatchedAck-F-S)
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 18 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 GREEN
Activating
signal RED
LED
Acknow
IEC09000313 V1 EN
Figure 18: Operating sequence 3, 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
Local Human-Machine-Interface LHMI
R
R
Section 4
en01000231.vsd
G
IEC09000313_1_en.vsd
Figure 19.
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