Schweitzer Engineering Laboratories SEL-421-4 - Page 1203

13.37
Date Code 20171006 Instruction Manual SEL-400 Series Relays
SELOGIC Control Equation Programming
SEL-311 and SEL-351 Series Users
Table 13.25 is a summary that compares SELOGIC control equation programming
in SEL-351 series relays and SEL-311 series relays with typical SEL-400 series
relays.
Table 13.26 shows the SEL-400 series Boolean operators compared to the opera-
tors used in the SEL-351 series relays.
In the SEL-351 series relays, SELOGIC control equation variables and timers are
connected. Each SEL
OGIC control equation variable is the input to a timer. In
SEL-400 series relays, timers and SEL
OGIC control equation variables are independent.
The SEL
OGIC control equation Boolean operators in SEL-400 series relays are
different from those used in SEL-300 series relays. For example, if you wish to
convert programming from an SEL-311 or SEL-351 series relay to an SEL-400
series relay, you must convert the operators. Example 13.23 and Example 13.24
demonstrate conversion of several settings to the SEL-451 setting.
Table 13.24 SEL-351 Series Relays and SEL-400 Series SELOGIC Control
Equation Programming Equivalent Functions
Feature SEL-351 Series
SEL-400 Series Protection
Freeform Style
SELOGIC control equation variables SV1–SV16 PSV01–PSV64
Timer Input SV1–SV16 PCT01–PCT32
Timer Pickup settings SV1PU–SV16PU PCT01PU–PCT32PU
Timer Dropout settings SV1DO–SV16DO PCT01DO–PCT32DO
Timer Outputs SV1T–SV16T PCT01Q–PCT32Q
Latch Bit Set Control SET1–SET16 PLT01S–PLT16S
Latch Bit Reset Control RST1–RST16 PLT01R–PLT16R
Latch Bit LT1–LT16 PLT01–PLT16
Table 13.25 SEL-400 Series SEL
OGIC Control Equation Programming Summary
Element
SEL-351 Series/
SEL-311 Series
Typical SEL-400 Series
Protection
Free Form
Automation
Free Form
SELOGIC control equation variables 16 64 256
SEL
OGIC math variables 0 64 256
Conditioning timers
a
a
Similar to SEL-300 series relay SELOGIC control equation programming.
16 32 0
Sequencing timers 0 32 32
Counters 0 32 32
Latch bits 16 32 32
Table 13.26 SEL-351 Series Relays and SEL-400 Series SEL
OGIC Control
Equation Boolean Operators
Feature SEL-351 Series SEL-400 Series
Logical AND operator * AND
Logical OR operator + OR
Logical NOT operator ! NOT
Parentheses ( ) ( )
Rising, falling edge operators /, \ R_TRIG, F_TRIG