4.196
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Logic Settings (SET L Command)
Settings Change
If individual settings are changed, the states of the latch bits (Relay Word bits
LT01 through LT32) are retained, as in the preceding Power Loss on
page 4.195 explanation. If the individual settings change causes a change in
the SEL
OGIC
control equation settings SETn or RSTn (n = 1 through 32), the
retained states of the latch bits can be changed, subject to the newly enabled
settings SETn or RSTn.
Make Latch Control Switch Settings With Care
The latch bit states are stored in nonvolatile memory, so that they can be
retained during power loss or settings change. The nonvolatile memory is
rated for a finite number of writes for all cumulative latch bit state changes.
Exceeding the limit can result in a flash self-test failure. An average of 5000
cumulative latch bit state changes per day can be made for a 25-year device
service life.
The settings SETn and RSTn cannot result in continuous cyclical operation of
the latch bit LTn. Use timers to qualify the conditions set in settings SETn and
RSTn. If you use any optoisolated inputs in settings SETn and RSTn, the
inputs each have a separate debounce timer that can help in providing the
necessary time qualification.
SEL
OGIC
Control
Equation Variables/
Timers
Enable the number of SEL
OGIC
control equations necessary for your
application. Only the enabled SEL
OGIC
control equations appear for the
settings. Each SEL
OGIC
control equation variable/timer has a SEL
OGIC
control equation setting input and variable/timer outputs, as shown in
Figure 4.135. Timers SV01T through SV32T in Figure 4.135 have a setting
range of 0.00–3000.00 seconds. This timer setting range applies to both
pickup and dropout times (SVnPU and SVnDO, n = 1 through 32).
Figure 4.135
SEL
OGIC
Control Equation Variable/Timers SV01/SV01T–SV32T
You can enter as many as 15 elements for each SEL
OGIC
control equation,
including a total of 14 elements in parentheses (see Table 4.56 for more
information).
SEL
OGIC
Control
Equation Operators
Use the Boolean operators to combine values with a resulting Boolean value.
Edge trigger operators provide a pulse output. Combine the operators and
operands to form statements that evaluate complex logic. SEL
OGIC
control
equations are either Boolean type or math type. Because the equals sign (=) is
already used as an equality comparison, both Boolean type and math type
SEL
OGIC
control equation settings begin with an “assignment” operator (:=)
instead of with an equals sign.
Boolean SEL
OGIC
control equation settings use logic similar to Boolean
algebra logic, combining Relay Word bits together with one or more of the
Boolean operators listed in Table 4.56. Math SEL
OGIC
control equation
settings operate on numerical values, using one or more of the mathematical
operators listed in Table 4.56. These numerical values can be mathematical
variables or real numbers.
SVn
SVn
SVnT
SEL
OGIC
Variable/
Timer Input Settings
Relay
Word
Bits
SVnPU
SVnDO
Summary of Contents for SEL-700G Series
Page 14: ...This page intentionally left blank ...
Page 22: ...This page intentionally left blank ...
Page 32: ...This page intentionally left blank ...
Page 52: ...This page intentionally left blank ...
Page 106: ...This page intentionally left blank ...
Page 510: ...This page intentionally left blank ...
Page 560: ...This page intentionally left blank ...
Page 578: ...This page intentionally left blank ...
Page 588: ...This page intentionally left blank ...
Page 604: ...This page intentionally left blank ...
Page 634: ...This page intentionally left blank ...
Page 738: ...This page intentionally left blank ...
Page 802: ...This page intentionally left blank ...