Delta AX-3 Series, Operation Manual

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AX - 3 S e r ie s O p e r a t i o n M a n u a l
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Variables
Rules for identifiers of variables:

No spaces or special characters

Not case sensitive (For example, Var0 and VAR0 are seen as the same variable)

No multiple consecutive underscores (For example, b__Var0 is not permitted)
Rules for multiple use of identifiers

Local variable cannot be declared more than one time.

If a local variable and a global variable share the same name, the local variable has priority within the POU.

Variables with the same name can be declared in different global variables list.
(For example, globe _list1 .bvar and globe_list2.bvar can co-exist in two different global variables lists.)
Comments

Single comment: the symbol // indicates a single comment, for example: // Variable Define

Multiple comments: the symbol (* XX : XX *) indicates multiples comments from XX to XX, for example (* Variable
Define : Variable Define*)
4.3.2.1 Declaration of Variables
In DIADesigner-AX projects you can declare variables in the following methods.
Syntax: <Variable Name> : <Data Type> := <Initialization> ;
Example:
Array
Syntax
：
<Variable Name>
：
ARRAY[0..N] OF <Data Type>
Example: