ABB RELION 630 Series Technical Manual page 48

Section 3
Basic functions
42
Activating
signal GREEN
Activating
signal YELLOW
Activating
signal RED
LED
Acknow.
IEC09000315 V1 EN
Figure 18: Operating sequence 3, three colors involved, alternative 2
Sequence 4 (LatchedAck-S-F)
This sequence has the same functionality as sequence 3, but steady and flashing light
have been alternated.
Sequence 5 (LatchedColl-S)
This sequence has a latched function and works in collecting mode. At the activation
of the input signal, the indication lights up with a steady light. The difference to
sequence 3 and 4 is that the indications that are still activated are not affected by the
reset, that is, immediately after the positive edge of the reset is executed, a new reading
and storing of active signals is performed. Every LED is independent of the other
LEDs in its operation.
Activating
signal
LED
Reset
IEC01000235 V2 EN
Figure 19: Operating sequence 5 (LatchedColl-S)
That means if an indication with higher priority has reset while an indication with
lower priority still is active at the time of reset, the LED changes color according to
Figure 20.
G R
G R
1MRS757256 F
Y
IEC09000315-1-en.vsd
IEC01000235_2_en.vsd
PML630/Compact Load-Shedding Solution
Technical Manual