Hitachi Relion 650 Series Technical Manual page 54

Section 5
Local HMI
Activating
signal GREEN
Activating
signal RED
LED
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Figure 12:
Sequence 2 (Follow-F)
This sequence is the same as Sequence 1, Follow-S, but the LEDs are flashing instead of showing
steady light.
Sequence 3 LatchedAck-F-S
This sequence has a latched function and works in collecting mode. Every LED is independent of the
other LEDs in its operation. At the activation of the input signal, the indication starts flashing. After
acknowledgment the indication disappears if the signal is not present any more. If the signal is still
present after acknowledgment it gets a steady light.
Activating
signal
LED
Acknow.
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Figure 13:
When acknowledgment is given, all indications that have appeared before the indication with higher
priority has been reset, will be acknowledged, independent of if the low priority indication appeared
before or after acknowledgment.
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
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Figure 14:
48
G
Operating sequence 1, two colors
Operating Sequence 3 LatchedAck-F-S
Figure 14
R
R
Operating Sequence 3 (LatchedAck-F-S), 2 colors involved
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G
R G
IEC09000312_1_en.vsd
en01000231.vsd
shows the sequence when a signal of lower priority
G
IEC09000313_1_en.vsd
1MRK 511 557-UEN Rev. A
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Technical Manual