13.5
Date Code 20171006 Instruction Manual SEL-400 Series Relays
SELOGIC Control Equation Programming
SEL
OGIC Control Equation Capacity
SELOGIC Control Equation Capacity
SELOGIC control equation capacity is a measure of how much remaining space
you have available for programming. In both protection and automation,
SEL
OGIC control equation capacity includes execution capacity and settings stor-
age capacity.
The relay will reject any setting that exceeds the available settings storage capac-
ity and execution capacity. You can then accept the previous settings you have
entered and examine your settings.
Protection
SEL-400 series relays typically provide storage space for as many as 250 lines of
protection freeform programming. See the product-specific instruction manual
for the number of lines limit for any specific product. Because the relay executes
protection fixed and freeform logic at a deterministic interval, there is a limit to
the amount of SEL
OGIC control equation programming that the relay can execute.
The relay calculates total capacity in terms of settings capacity and execution
capacity.
NOTE: The SEL-487B supports 100
lines of protection freeform
programming.
Rather than limit parameters to guarantee that your application not exceed the
maximum processing requirements, the relay measures and calculates the avail-
able capacity when you enter SEL
OGIC control equations. The relay will not
allow you to enter programming that will cause the relay to be unable to complete
all protection SEL
OGIC control equations each protection processing interval.
There are six protection settings groups. Only one protection settings group can
be active. When a protection settings group is active, the relay executes SEL
OGIC
control equations in the Global Settings, Protection Group Settings, Protection
Freeform Settings, Output Settings, and several other settings areas. The relay
calculates protection capacities based on the total amount of SEL
OGIC control
equation programming executed when the protection settings group is active. Use
the STATUS S command to display the remaining settings capacity and execu-
tion capacity for protection fixed and freeform logic.
Automation
SEL-400 series relays provide storage space for as many as 10 blocks of as many
as 100 lines of automation freeform programming each. Use the STATUS S com-
mand to display the remaining settings capacity and execution capacity for auto-
mation freeform logic.
There is a maximum execution capacity and settings storage capacity. If you
enter a setting that exceeds maximum capacity, the relay will reject the setting.
You will have the opportunity to reenter the setting or save any other settings you
entered during that session.
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