= No indication = Steady light
= Flash
G
= Green
Y
= Yellow
R
= Red
IEC09000311.vsd
IEC09000311 V1 EN
Figure 13: Symbols used in the sequence diagrams
Sequence 1
(Follow-S)
This sequence follows the corresponding input signals all the time with a steady light.
It does not react on acknowledgment or reset. Every LED is independent of the other
LEDs in its operation.
Activating
signal
LED
IEC01000228_2_en.vsd
IEC01000228 V2 EN
Figure 14: Operating Sequence 1 (Follow-S)
If inputs for two or more colors are active at the same time to the same LED, the
priority color it shows is in accordance with the color described above. An example of
the operation when two colors are activated in parallel to the same LED is shown in
figure15.
Activating
signal GREEN
LED
IEC09000312_1_en.vsd
G
R G
G
Activating
signal RED
IEC09000312 V1 EN
Figure 15: Operating sequence 1, two colors
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
1MRK502052-UEN B Section 5
Local Human-Machine-Interface LHMI
91
Technical manual
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