ABB ret650, Technical Manual

Page: 73 / 670

Each indication LED on local HMI can be set individually to operate in 6 different
sequences; two as follow type and four as latch type. Two of the latching sequence
types are intended to be used as a protection indication system, either in collecting or
restarting mode, with reset functionality. The other two are intended to be used as
signalling system in collecting mode with acknowledgment functionality.
5.5.2.2 Status LEDs
There are three status LEDs above the LCD in the front of the IED, green, yellow and
red.
The green LED has a fixed function that present the healthy status of the IED. The
yellow and red LEDs are user configured. The yellow LED can be used to indicate that
a disturbance report is triggered (steady) or that the IED is in test mode (flashing). The
red LED can be used to indicate a trip command.
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 configure the setting to
Off , Start
or Trip for that particular signal.
5.5.2.3 Indication LEDs
Operating modes
Collecting mode
• LEDs, which are used in 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.
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.
Acknowledgment/reset
• From local HMI
•
The active 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.
1MRK 504 135-UEN A
Section 5
Local Human-Machine-Interface LHMI
67
Technical manual