ABB Relion 670 series, Technical Reference Manual, Page: 71 / 1232

en05000506.vsd
= No indication = Steady light = Flash
IEC05000506 V1 EN
Figure 10: 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 11: Operating sequence 1 (Follow-S)
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.
en01000231.vsd
IEC01000231 V1 EN
Figure 12: Operating sequence 3 (LatchedAck-F-S)
1MRK505222-UUS C
Section 3
Local HMI
65
Technical reference manual