5.5.2 LED
5.5.2.1 Functionality
The function blocks LEDGEN and GRP1_LEDx, GRP2_LEDx and GRP3_LEDx
(x=1-15) controls and supplies information about the status of the indication LEDs. The
input and output signals of the function blocks are configured with PCM600. The input
signal for each LED is selected individually using SMT or ACT. Each LED is controlled
by a GRP1_LEDx function block, that controls the color and the operating mode.
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
1MRK 511 287-UUS A Section 5
Local Human-Machine-Interface LHMI
71
Technical manual
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