ABB Relion REG670, Technical Manual

Page: 95 / 1298

The yellow and red status LEDs are configured in the disturbance recorder function,
DRPRDRE, by connecting a start or trip signal from the actual function to a BxRBDR
binary input function block using the PCM600, and configuring the setting to
Off ,
Start or Trip for that particular signal.
5.5.2.3 Indication LEDs
Operating modes
Collecting mode
• LEDs that are used in the collecting mode of operation are accumulated
continuously until the unit is acknowledged manually. This mode is suitable
when the LEDs are used as a simplified alarm system. When all three inputs (red,
yellow and green) are connected to different sources of events for the same
function block, collecting mode shows the highest priority LED color that was
activated since the latest acknowledgment was made. If a number of different
indications were made since the latest acknowledgment, it is not possible to get
a clear view of what triggered the latest event without looking at the sequence of
events list. A condition for getting the sequence of events is that the signals have
been engineered in the disturbance recorder.
Re-starting mode
• In the re-starting mode of operation each new start resets all previous active LEDs
and activates only those which appear during one disturbance. Only LEDs
defined for re-starting mode with the latched sequence type 6 (LatchedReset-S)
will initiate a reset and a restart at a new disturbance. A disturbance is defined to
end a settable time after the reset of the activated input signals or when the
maximum time limit has elapsed. In sequence 6, the restarting or reset mode
means that upon occurrence of any new event, all previous indications will be
reset. This facilitates that only the LED indications related to the latest event is
shown.
Acknowledgment/reset
• From local HMI
•
The active LED indications can be acknowledged/reset manually. Manual
acknowledgment and manual reset have the same meaning and is a
common signal for all the operating sequences and LEDs. The function is
positive edge triggered, not level triggered. The acknowledgment/reset is
performed via the
button and menus on the LHMI.
• From function input
•
The active LED indications can also be acknowledged/reset via an input,
CLRLEDS
, to the function block LHMICTRL. This input can for example
be configured to a binary input operated from an external push button or a
1MRK502052-UEN B
Section 5
Local Human-Machine-Interface LHMI
89
Technical manual