P.14.8
SEL-411L Relay Protection Manual Date Code 20151029
SELOGIC Control Equation Programming
Multiple Setting Groups
Automation
Automation SELOGIC control equation programming is a large free-form
programming area that consists of 10 blocks. The relay executes each block
sequentially from the first block to the last. You do not need to fill a block
completely or enter any equations in a block before starting to write SEL
OGIC
control equations in the following blocks.
The relay dedicates a minimum processing time when executing automation
SEL
OGIC control equations. If the processing load is light, the relay uses more
processing time for executing programming. This means that the overall
execution time fluctuates. You can display the average and peak execution
time with the STATUS S ASCII command. Use the STATUS SC command to
reset the peak execution time.
NOTE: Organize automation SELOGIC
control equation programming into
blocks based on function. It is easier
to edit and troubleshoot small
partially filled blocks that contain
related programming.
Use automation SELOGIC control equation programming to automate tasks
that do not require time-critical, deterministic execution. For example, if you
are coordinating control inputs from a substation HMI and SCADA master,
use automation free-form SEL
OGIC control equations and set the output
contact setting to the automation SEL
OGIC control equation variable that
contains the result.
Perform time-critical tasks with protection free-form SEL
OGIC control
equations. For example, if you require a SEL
OGIC control equation for TR
(trip) that contains more than 15 elements, you must perform that calculation
in several steps. Because detection of a TR condition is a time-critical activity,
perform the calculation with protection free-form SEL
OGIC control equations
and set TR to the protection SEL
OGIC control equation variable that contains
the result.
Outputs
To provide protection and automation area separation, the output settings are
in a fixed SEL
OGIC control equation area separate from protection and
automation programming. You can take advantage of this separation to
combine protection and automation in a manner that best fits your application.
Outputs include the relay control outputs, outgoing M
IRRORED BITS
®
points,
and remote analog outputs. The relay executes output logic and processes
outputs at the protection processing interval.
Multiple Setting Groups
The relay has six (6) independent setting groups, as shown in the left-hand
side of Figure 14.2. Each setting group has complete relay settings and
protection SEL
OGIC settings. The active setting group can be:
➤ Shown or selected with the SEL ASCII serial port GROUP
command.
➤ Shown or selected with the MAIN menu Set/Show menu item
and the
Active Group submenu item.
➤ Selected with SELOGIC control equation settings SS1–SS6.
Settings SS1–SS6 have priority over all other selection
methods. Use remote bits in these equations to select setting
groups with Fast Operate commands.
➤ Shown with DNP3 Objects 20 and 22 and selected with Objects
40 and 41.
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