ABB Relion 670 Series Technical Reference Manual page 72

Section 3
Local HMI
66
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 will light up with a steady light. The difference to
sequence 3 and 4 is that indications that are still activated will not be affected by the
reset that is, immediately after the positive edge of the reset has been 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 13: Operating sequence 5 (LatchedColl-S)
Sequence 6 (LatchedReset-S)
In this mode all activated LEDs, which are set to sequence 6 (LatchedReset-S), are
automatically reset at a new disturbance when activating any input signal for other
LEDs set to sequence 6 (LatchedReset-S). Also in this case indications that are still
activated will not be affected by manual reset, that is, immediately after the positive
edge of that the manual reset has been executed a new reading and storing of active
signals is performed. LEDs set for sequence 6 are completely independent in its
operation of LEDs set for other sequences.
Definition of a disturbance
A disturbance is defined to last from the first LED set as LatchedReset-S is activated
until a settable time, tRestart, has elapsed after that all activating signals for the LEDs
set as LatchedReset-S have reset. However if all activating signals have reset and some
signal again becomes active before tRestart has elapsed, the tRestart timer does not
restart the timing sequence. A new disturbance start will be issued first when all signals
have reset after tRestart has elapsed. A diagram of this functionality is shown in figure
14.
1MRK505222-UUS C
IEC01000235_2_en.vsd
Technical reference manual