Campbell Scientific CR5000 Measurement and Control Module - Manual (Page 89)

5-1
Section 5. Program Declarations
Alias
Used to assign a second name to a variable.
Syntax
Alias VariableA = VariableB
Remarks
Alias allows assigning a second name to a variable. Within the datalogger
program, either name can be used. Only the alias is available for Public variables.
The alias is also used as the root name for data table fieldnames.
With aliases the program can have the efficiency of arrays for measurement and
processing yet still have individually named measurements.
Alias Declaration Example
The example shows how to use the Alias declaration.
Dim TCTemp(4)
Alias TCTemp(1) = CoolantT
Alias TCTemp(2) = ManifoldT
Alias TCTemp(3) = ExhaustT
Alias TCTemp(4) = CatConvT
Const
Declares symbolic constants for use in place of numeric entries.
Syntax
Const constantname = expression
Remarks
The Const statement has these parts:
Part Description
constantname Name of the constant.
expression Expression assigned to the constant. It can consist of literals
(such as 1.0), other constants, or any of the arithmetic or
logical operators.
Tip Constants can make your programs self-documenting and easier to
modify. Unlike variables, constants can't be changed while your
program is running.
Caution Constants must be defined before referring to them.
Tip Use all uppercase letters for constant names to make them easy to
recognize in your program listings.