= 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 all the time, with a steady light, the corresponding input signals.
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 one LED the priority is
as described above. An example of the operation when two colors are activated in
parallel is shown in
Figure 15.
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.
1MRK 505 277-UUS C Section 5
Local Human-Machine-Interface LHMI
59
Technical Manual
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