4.105
Date Code 20081022 Instruction Manual SEL-787 Relay
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 SELOGIC 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 after
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.
Enter any of the Relay Word bits (or combinations of Relay Word bits) as
conditions in the Tn_LED SEL
OGIC control equation settings. When these
Relay Word bits assert, the corresponding LED also asserts.
Pushbutton LEDs
Enter any of the Relay Word bits (or combinations of Relay Word bits) as
conditions in the PBp_LED (p = 1A, 1B, . . . 4A, 4B) SEL
OGIC control
equation settings. When these Relay Word bits assert, the corresponding LED
also asserts. Table 4.58 shows the setting prompts, settings ranges, and default
settings for the LEDs.
Table 4.57 Target LED Settings
Setting Prompt Setting Range Setting Name := Factory Default
TRIP LATCH T_LED Y, N T01LEDL := Y
LED1 EQUATION SEL
OGIC T01_LED := 87U OR 87R
TRIP LATCH T_LED Y, N T02LEDL := Y
LED2 EQUATION SEL
OGIC T02_LED := ORED50T
TRIP LATCH T_LED Y, N T03LEDL := Y
LED3 EQUATION SEL
OGIC T03_LED := ORED51T
TRIP LATCH T_LED Y, N T04LEDL := Y
LED4 EQUATION SEL
OGIC T04_LED := 27P1T OR 27P2T OR
59P1T OR 59P2T OR 59Q1T OR
59Q2T
TRIP LATCH T_LED Y, N T05LEDL := Y
LED5 EQUATION SEL
OGIC T05_LED := 81D1T OR 81D2T OR
81D3T OR 81D4T
TRIP LATCH T_LED Y, N T06LEDL := Y
LED6 EQUATION SEL
OGIC T06_LED := 24D1T OR 24C2T
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