4.78
SEL-787 Relay
Instruction Manual
Date Code 20081022
Protection and Logic Functions
Logic Settings (SET L Command)
If the math variable (MV01) is not equal to 45 in value, output contact
OUT102 asserts (effectively OUT102 := logical 1). If the math variable
(MV01) is equal to 45 in value, output contact OUT102 deasserts (effectively
OUT102 := logical 0).
shows other operators and values that you
can use in writing SEL
OGIC
control equations.
Timers Reset When
Power Lost or
Settings Changed
If the device loses power or settings change, the SEL
OGIC
control equation
variables/timers reset. Relay Word bits SV
n
and SV
n
T (
n
= 01–32) reset to
logical 0 after power restoration or a settings change.
shows an
effective seal-in logic circuit, created by the use of Relay Word bit SV07
(SEL
OGIC
control equation variable SV07) in SEL
OGIC
control equation
SV07:
SV07 =
(SV07 OR OUT101) AND (OUT102 OR OUT401)
Figure 4.50
Example Use of SEL
OGIC
Variables/Timers
SV/Timers Settings
The SEL-787 includes 32 SEL
OGIC
shows the pickup,
dropout, and equation settings for SV01 through SV05. The remaining
SEL
OGIC
variables are not enabled (see
).
Table 4.28
Other SEL
OGIC
Control Equation Operators/Values
Operator/
Value
Function
Function Type
(Boolean and/or
Mathematical)
0
Set SEL
OGIC
control equation directly to logical 0
(XXX := 0)
Boolean
1
Set SEL
OGIC
control equation directly to logical 1
(XXX := 1)
Boolean
#
Characters entered after the # operator are not
processed and deemed as comments
Boolean and
Mathematical
\
Indicates that the preceding logic should be
continued on the next line (“\” is entered only at the
end of a line)
Boolean and
Mathematical
SV06PU
SV06D0
SV07PU
SV07D0
SV06
SV07
OUT101
OUT102
OUT103
OUT401
OUT101
OUT102
OUT401
Table 4.29
SEL
OGIC
Variable Settings
(Sheet 1 of 2)
Setting Prompt
Setting Range
Default Settings
SV TIMER PICKUP
0.00–3000.00 sec
SV01PU := 3.00
SV TIMER DROPOUT
0.00–3000.00 sec
SV01DO := 0.00
SV INPUT
SEL
OGIC
SV01 := PB01
SV TIMER PICKUP
0.00–3000.00 sec
SV02PU := 0.25
SV TIMER DROPOUT
0.00–3000.00 sec
SV02DO := 0.00
SV INPUT
SEL
OGIC
SV02 := PB01 OR PB02 OR
PB03 OR PB04
SV TIMER PICKUP
0.00–3000.00 sec
SV03PU := 0.00
Summary of Contents for SEL-787
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