Rockwell Automation 1746-BAS BASIC LANGUAGE - Manual (Page 21)

Publication 1746-RM001A-US-P
Data Types 2-5
Variable Names
Variables may represent either numeric values or strings. Variable names can only
be eight characters long. The module compares the first, last, and number of
characters in a variable name with the first, last, and number of characters in other
variable names to determine if it is a unique variable name. The characters allowed
in a variable name are letters, numbers, and the decimal point. Special type
declaration characters are also allowed.
A variable can be a letter (for example
A
,
X
, or
I
) followed by a:
•
single-dimension expression, (example: J(4), G(A+6), I(10*SIN(X) )
•
number followed by a single-dimension expression (example:
A1(8),
P7(10*SIN(X)), W8(A + C) )
•
number (0 to 9) or letter (example:
AA, AC, XX, A1, X3, G8
) except for the
following combinations: CR, DO, IE, IF, IP, ON, PI, SP, TO, UI, UO
Variable Types
Type declaration characters indicate what a variable represents. The following type
declaration character is recognized:
The only other legal variable type is a floating-point variable. Floating-point
variables do not require a type declaration.
IMPORTANT
Reserved words (words already used in BASIC functions or
statements) cannot be used as variable names.
Character Variable Type
$ String variable