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Description

Variable Declaration

Declares the internal variables in the following format:

VAR variable_name [, variable_name];.

The initial value of the declared variables is 0. To declare more than one variable, use a comma “ , ” between them. You can use several VAR keywords before the program part starts.

The variable name cannot be duplicated with the tag names (Group, Digital, Analog, String). The duplicated name may cause compile errors or incorrect operation.

Input Parameter Declaration

Declares the input parameters in the following format:

PARAM 1^st parameter [, 2^nd parameter …]; .

The input parameter is required when a program is called by another program or a command. The declaration order must be identical to the order of input parameters. The parameter will be initialized with the values assigned by the caller.

To declare more than one parameter, use a comma “ , ” between them. You can use several PARAM keywords before the program part starts.

Example

Program Name: MyPgm

VAR a, b;

VAR c;

PARAM p1, p2;

PARAM p3;

The program MyPgm can be called by the external caller as shown below.

MyPgm(1,2,3);

In the parameter p1, p2, p3, assigned values (1, 2, 3) will be stored. The variables a, b, c, will be initialized as 0.