Variables; Creating Variables - Universal Devices ISY-99i Series User Manual

Run (If) – force the evaluation of the IF statement and run the program
Run Then – force the run of the THEN portion of a program
Run Else – force the run of the ELSE portion of a program
Stop – stop a currently running program
Enable Run At Startup – set a program so that it will automatically start running when the
ISY reboots
Disable Run At Startup – set a program so that it will not automatically run when the ISY
reboots
On the left-most side of the tool bar are the EDIT button which will bring you to the
Program Details tab and allow you to edit the currently highlighted program. The
REFRESH button forces a refresh of the screen.

3.5 Variables

Variables can be incredibly useful when creating programs on the ISY. Variables can be
stored, modified using arithmetic operations, and compared. You can use variables to
provide information, trigger programs, etc.
To view your variables, click on the Programs tab then the Variables sub-tab.
There are two different types of variables (Integer and State), each divided into a separate
sub-tab. The only difference between the two is that State variables create ISY events when
modified, so they can be used to trigger ISY Programs.
For example, if you'd like to create an ISY Program that runs only when a variable is or
reaches a certain value, use a State variable. Otherwise, if the variable's value will not be
used to trigger a program, feel free to use the simpler Integer variable.

3.5.1 Creating Variables

To create a new variable, click the Add button on the bottom of the screen. Here is a list of
each column and a quick definition:
Name – This is the user-defined name of the variable. Choose a name that's descriptive so
that you'll be able to quickly identify the variable you want to use in ISY Programs.
Init – This is the initial value of the variable, the value it has if the ISY is rebooted. This can
be defined here and also updated using ISY Programs so that a variable value can persist
even if the ISY loses power.
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