8.8
SEL-587Z Instruction Manual
Date Code 20020903
Front-Panel Interface
Local Control
Local Control
Local control asserts (sets to logical 1) or deasserts (sets to logical 0) local bits
LB1 through LB8. These local bits are available as Relay Word bits and are
used in SEL
OGIC
control equations (see
).
The front-panel primary function Local Control (accessed via the
{CNTRL}
pushbutton) does not have a serial port command equivalent. Use local control
to enable/disable schemes, trip/close breakers, etc., via the front panel.
Local control can emulate the switch types shown in
through
.
Figure 8.4
Local Control Switch Configured as an ON/OFF Switch.
Figure 8.5
Local Control Switch Configured as an OFF/MOMENTARY Switch.
Figure 8.6
Local Control Switch
Configured as an ON/OFF/MOMENTARY Switch.
Local control switches are created by making corresponding switch position
label settings. These text label settings are set with the
SET T
command or
viewed with the
SHOWSET T
command via the serial port [see
and
SHO (Showset) on page 7.15 in Section 7: ASCII Command Reference
]. For
more information on local control, see
Local Control Switches (NLBn, SLBn,
CLBn, PLBn) on page 4.5 in Section 4: Control Logic
EXAMPLE 8.1
Display Points and Local Bit Configuration
Set the first three local bits to emulate the following three switches:
1.
Configure the first Local Bit as a bus zone ON/OFF switch.
2.
Configure the second Local Bit as a breaker fail isolate ON/OFF
switch, with the switch status visible on rotating display, using
Display Points.
3.
Configure the third Local Bit as a breaker TRIP switch.
Logical 1
LBn
(n=1
through 8)
Relay
Word
Bit
ON
position
OFF
position (logical 0)
Logical 1
LBn
(n=1
through 8)
Relay
Word
Bit
OFF position
(logical 0)
MOMENTARY
position
Logical 1
LBn
(n=1
through 8)
Relay
Word
Bit
ON
position
OFF
position (logical 0)
MOMENTARY
position
Summary of Contents for SEL-587Z
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