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4.104
SEL-787 Relay
Instruction Manual
Date Code 20081022
Protection and Logic Functions
Front-Panel Settings (SET F Command)
➤
CLB
nn
: Clear local bit. Enter the text that describes the
intended operation of the switch (this text appears on the
display) when LB
nn
deasserts (OPEN, for example).
➤
SLB
nn
: Set local bit. Enter the text that describes the intended
operation of the switch (this text appears on the display) when
LB
nn
asserts (CLOSE, for example).
➤
PLB
nn
: Pulse local bit. When selecting the pulse operation,
LB
nn
asserts for only one processing interval before
deasserting again. Enter the text that describes the intended
operation when LB
nn
asserts (START, for example).
➤
Omit either SLB
nn
or PLB
nn
(never CLB
nn
) by setting the
omitted setting to NA.
For the transformer in our example, configure two local bits: one to replace a
supervisory switch, and the other to start a fan motor. Local bit 1 replaces a
supervisory switch (SUPERV SW) and we use the clear/set combination.
Local bit 2 starts a fan motor (START) that only needs a short pulse to seal
itself in, and we use the clear/pulse combination.
shows the
settings to program the two local bits.
=>>
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 4.74
Adding Two Local Bits
Содержание SEL-787
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