8.14
SEL-787 Relay
Instruction Manual
Date Code 20081022
Front-Panel Operations
Operation and Target LEDs
Other Target Reset Options
Use the ASCII command
TAR R
to reset the target LEDs; see
for
more information. Programming specific conditions in the SEL
OGIC
control
equation RSTTRGT is another method for resetting target LEDs. Access
RSTTRGT in
Global Settings (SET G Command)
and see
for
further information.
Front-Panel Operator
Control Pushbuttons
The SEL-787 features four operator-controlled pushbuttons, each with two
programmable pushbutton LEDs, for local control as shown in
Figure 8.25
Operator Control Pushbuttons and LEDs
Pressing any one of these four pushbuttons asserts the corresponding PB
n
(
n
= 01 through 04) Relay Word bit, and the corresponding PB
n
_PUL Relay
Word bit. The PB
n
Relay Word bit remains asserted as long as the pushbutton
is pressed, but the PB
n
_PUL Relay Word bit asserts only for the initial
processing interval, even if the button is still being pressed. Releasing the
pushbutton, and then pressing the pushbutton again asserts the corresponding
PB
n
_PUL Relay Word bit for another processing interval. The pushbutton
LEDs are independent of the pushbutton.
Pushbutton LEDs are programmable using front-panel settings PB
nm
_LED
(where
n
= 1 through 4 and
m =
A or B). PB
nm
_LED settings are SEL
OGIC
control equations that, when asserted, illuminate the corresponding LED for
as long as the input is asserted. When the input deasserts, the LED also
deasserts without latching.
Using SEL
OGIC
control equations, you can readily change the default LED
and pushbutton functions. The user-configurable slide-in labels can be used to
mark the pushbuttons and pushbutton LEDs with custom names to reflect any
programming changes that you make. Included on the SEL-787
Product
Literature CD are word processor templates for printing slide-in labels. See
the instructions included in the Configurable Label kit for more information
on changing the slide-in labels.
describes front-panel operator controls based on the factory default
settings and operator control labels.
Factory Default
Slide-In Label
Pushbutton LED
(PB1A_LED)
Operator Control
Pushbutton
Pushbutton LED
(PB1B_LED)
ENABLED
LOCK
DISABLED
BRKR 1
SELECT
BRKR 2
BRKR 1 CLOSED
CLOSE
BRKR 2 CLOSED
BRKR 1 OPEN
TRIP
BRKR 2 OPEN
Summary of Contents for SEL-787
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