R.3.14
SEL-421 Relay Reference Manual Date Code 20111215
SELOGIC Control Equation Programming
SELOGIC Control Equation Elements
EXAMPLE 3.4 SELOGIC Control Equation Variables
The equations below show free-form SEL
OGIC control equation
programming examples that use SEL
OGIC control equation variables.
Each line has a comment after the # that provides additional detail.
PSV01 := 1 # Set PSV01 to 1 always.
PSV09 := PSV54 AND ASV005 # Set to result of Boolean AND.
PSV02 := PMV05 > 5 # Set if PMV05 is greater than 5
You can use SELOGIC control equation variables more than once in
free-form programming. The SEL
OGIC control equations below use
ASV100 and ASV101 to calculate intermediate results.
# Remote control 1
ASV100 := RB14 AND ALT01 # Supervise remote control with ALT01
ASV101 := RB15 AND PLT07 # Supervise remote control with PLT07
ASV201 := ASV100 OR ASV101 # Store desired control in ASV201
# Remote control 2
ASV100 := RB18 AND ALT09 # Supervise remote control with ALT09
ASV101 := RB19 AND PLT13 # Supervise remote control with PLT13
ASV202 := ASV100 OR ASV101 # Store desired control in ASV202
SELOGIC Control
Equation Math
Variables
SELOGIC control equation math variables are math calculation storage results.
As with protection and automation SEL
OGIC control equation variables, there
are separate storage areas for protection and automation math calculations.
The quantities of SEL
OGIC control equation math variables available in the
SEL-421 are shown in Table 3.10.
Use math variables in free-form programming to store the results of math
calculations as arguments in math calculations and comparisons. Example 3.5
illustrates SEL
OGIC control equation math variable usage.
EXAMPLE 3.5 SELOGIC Control Equation Math Variables
The equations below show free-form SEL
OGIC control equation
programming examples that use SEL
OGIC control equation math
variables. Each line has a comment after the # that provides
additional description.
PMV01 := 378.62 # Store 387.62 in PMV01
PMV09 := 5 + VAFM # Store sum of 5 and A-phase voltage in kV in PMV09
You can use SELOGIC control equation math variables more than once
in free-form programming. Use AMV010 in the following SEL
OGIC
control equations to calculate intermediate results.
# Determine if any phase voltage is greater than 13 kV
# A-phase
AMV010 := VAFIM/1000 # VA in kV
ASV010 := AMV010 > 13 # Set if greater than 13 kV
# B-phase
AMV010 := VBFIM/1000 # VB in kV
Tabl e 3 . 10 SEL OGIC Control Equation Math Variable Quantities
Type Quantity Name Range
Protection SELOGIC control equation math variables 64 PMV01–PMV64
Automation SEL
OGIC control equation math vari-
ables
256 AMV001–AMV256
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