Sel 751A - Expression Builder Organization; Using the Expression Builder; Figure 3.9 Expressions Created with Expression Builder

3.10
SEL-751A Relay Instruction Manual Date Code 20100129
PC Software
Settings
Figure 3.9 Expressions Created With Expression Builder
Expression Builder Organization
The Expression Builder dialog box is organized into two main parts
representing the left side (LVALUE) and right side (RVALUE) of the
SEL
OGIC control equation. The LVALUE is fixed for all settings.
Using the Expression Builder
Use the right side of the equation (RVALUE) to select broad categories of
device elements, analog quantities, counters, timers, latches, and logic
variables. Select a category in the RVALUE tree view, and the Expression
Builder displays all operands for that category in the list box at the bottom
right side. Directly underneath the right side of the equation, choose operators
to include in the RVALUE. These operators include basic logic, rising- and
falling-edge triggers, expression compares, and comments.
File > Save
Select the Save menu item from the File menu item of the Settings Editor
once settings are entered into
ACSELERATOR QuickSet. This will help ensure
the settings are not lost.
File > Send
To transfer the edits made in the ACSELERATOR QuickSet edit session, you
must send the settings to the relay. Select Send from the File menu. In the
dialog box that opens, select the settings section you want transferred to the
relay by checking the appropriate box.
Ellipsis Button
Created Expression