ABB Relion 650 Series Technical Manual page 66

Section 4
Local Human-Machine-Interface LHMI
22 Communication port
4.5.2 LED
4.5.2.1 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 six 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.
4.5.2.2 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, while the yellow and red LEDs are user configured. The yellow
LED can be used to indicate that a disturbance report is created (steady) or that the IED is in test
mode (flashing). The red LED can be used to indicate a trip command.
4.5.2.3 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
•
60
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
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Line distance protection REL650
Technical manual