4.106
SEL-787 Relay Instruction Manual Date Code 20150130
Protection and Logic Functions
Front-Panel Settings (SET F Command)
Target LED Settings
The SEL-787 offers the following two types of LEDs. See Figure 8.1 and
Figure 8.25 for the programmable LED locations:
➤ Six Target LEDs
➤ Eight Pushbutton LEDs
You can program all 14 LEDs using SEL
OGIC control equations, the only
difference being that the Target LEDs also include a latch function.
Target LEDs
Settings TnLEDL (n = 01 through 06) and Tn_LED (n = 01 through 06)
control the six front-panel LEDs. With TnLEDL set to Y, the LEDs latch the
LED state at TRIP assertion. To reset these latched LEDs, the corresponding
LED equation must be deasserted (logical 0) and one of the following takes place:
➤ Pressing TARGET RESET on the front panel.
➤ Issuing the serial port command TAR R.
➤ The assertion of the SELOGIC equation RSTTRGT.
With TnLEDL settings set to N, the LEDs do not latch and directly follow the
state of the associated SEL
OGIC control equation setting.
=>>SET F TERSE <Enter>
Front Panel
General Settings
DISPLY PTS ENABL (N,1-32) EDP := 5 ? <Enter>
LOCAL BITS ENABL (N,1-32) ELB := N ? 2 <Enter>
LCD TIMEOUT (OFF,1-30 min) FP_TO := 15 ? > <Enter>
•
•
•
Target LED Set
TRIP LATCH T_LED (Y,N) T01LEDL := Y ? > <Enter>
Display Point Settings (maximum 60 characters):
(Boolean): Relay Word Bit Name, "Alias", "Set String", "Clear String"
(Analog) : Analog Quantity Name, "User Text and Formatting"
DISPLAY POINT DP01 (60 characters)
DP01 := IN101,"TRFR 1 HV BRKR:",CLOSED,OPEN
? > <Enter>
Local Bits Labels:
LB_ NAME (14 characters; Enter NA to null)
NLB01 :=
? SPERV SW <Enter>
CLEAR LB_ LABEL (7 characters; Enter NA to null)
CLB01 :=
? OPEN <Enter>
SET LB_ LABEL (7 characters; Enter NA to null)
SLB01 :=
? CLOSE <Enter>
PULSE LB_ LABEL (7 characters; Enter NA to null)
PLB01 :=
? NA <Enter>
LB_ NAME (14 characters; Enter NA to null)
NLB02 :=
? FAN START <Enter>
CLEAR LB_ LABEL (7 characters; Enter NA to null)
CLB02 :=
? OFF <Enter>
SET LB_ LABEL (7 characters; Enter NA to null)
SLB02 :=
? NA <Enter>
PULSE LB_ LABEL (7 characters; Enter NA to null)
PLB02 :=
? START <Enter>
Save changes (Y,N)? Y <Enter>
Settings Saved
=>>
Figure 4.80 Adding Two Local Bits
NOTE: If the LED latch setting
(TnLEDL) is set to Y, and TRIP asserts,
the LED latches to the state at TRIP
assertion. The latched LED targets can
be reset with TARGET RESET if the
target conditions are absent.
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