ABB RELION 630 Series Technical Manual page 45

1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual
positive-edge triggered, not level triggered. This means that even if the
button is continuously pressed, the acknowledgment/reset only affects
indications active at the moment when the button is first pressed.
• Automatic reset
• Only indications defined for re-starting mode with the latched sequence
type 6 (LatchedReset-S)The can be automatically reset. When the LEDs
have automatically been reset, still persisting indications are indicated with
a steady light.
Operating sequence
The sequences can be of type Follow or Latched. For the Follow type, the LED follow
the input signal completely. For the Latched type, each LED latches to the
corresponding input signal until it is reset.
The figures below show the function of available sequences selectable for each LED
separately. For sequence 1 and 2 (Follow type), the acknowledgment/reset function is
not applicable. Sequence 3 and 4 (Latched type with acknowledgement) are only
working in collecting mode. Sequence 5 is working according to Latched type and
collecting mode while sequence 6 is working according to Latched type and restarting
mode. The letters S and F in the sequence names have the meaning S = Steady and F
= Flash.
At the activation of the input signal, the indication obtains corresponding color
corresponding to the activated input and operates according to the selected sequence
diagrams.
= No indication
= Green
G
IEC09000311 V1 EN
Figure 12: 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.
= Steady light
= Yellow
Y
IEC09000311.vsd
Section 3
Basic functions
= Flash
= Red
R
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