Owner's Manual (Complete)

Chapter 11 - Expressions
2 The Home Control Assistant
Compute and Compute test visual programmer elements
To use these expressions two visual programmer elements are available: Compute and Compute
Test.
The properties of the Compute element are:
In the Compute element is placed a series of expressions in the form:
<flag name> = <expression> ;
<flag name> = <expression> ;
...
<flag name> = <expression>
When the compute element is executed, the expressions are evaluated and the computed values are
assigned to the named flags.
The Compute Test element contains a single expression that is evaluated to determine a yes or no
value. If the value is "yes" the path marked "yes" in the program is taken from the Compute Test
element, and likewise for "no".
In both these elements the Validate button is used to check that the expression you have entered is
correct – it matches the syntax that HCA expects.