Campbell Scientific CR9000X Measurement and Control System - Manual (Page 171)

Section 5. Program Declarations
Constants (and pre-defined constants), Variables, Constants, Aliases, Units, Data
Tables, Functions, and Subroutines must be declared before being used in a
CRBasic program. They are normally declared at the beginning of a CRBASIC
program.
The Declarations instructions include:
Public makes the variable available in the Public table
Dim declares variables and variable arrays
Const declares symbolic constants for use in place of numeric entries
Alias assigns a second name to a variable
StationName sets the station name (up to 64 characters)
Units
assign a label to identify the units to a variable
Function Declares a user defined Function.
Sub Declares a Subroutine.
Data Tables must also be declared in the program, using the DataTable instruction,
prior to calling the Data Table from the body of the main program. Data Tables
and their structures are covered in Section 6
Data Table Declarations and
Output Processing Instructions .
See Section 4.2.4 Declarations for additional Information.
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 datatable fieldnames.
With aliases the program can have the efficiency of arrays for measurement and
processing yet still have individually named measurements.
A swath of data can be Aliased by assigning a dimension to the AliasName
Example: ALIAS VariableName(3) = AliasName(2); will result in
VariableName(3) being aliased with AliasName(1)
VariableName(4) being aliased with AliasName(2)
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
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