Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario descargar pdf (Pagina 63)

Operating Functions

Chapter 5

5–26

Upon execution of line 10 IF A is equal to 100, THEN A is assigned a

value of 0. IF A does not equal 100, A is assigned a value of A+1. If you

want to transfer control to different line numbers using the IF

statement, you may omit the GOTO statement. The following examples

give the same results:

u20 IF INT(A) t10 THEN GOTO 100 ELSE GOTO 200

u20 IF INT(A) t10 THEN 100 ELSE 200

You can replace the THEN statement with any valid BASIC Module

statement, as shown below:

u30 IF Atu 10 THEN PRINT A ELSE 10

u30 IF Atu 10 PRINT A ELSE 10

You may execute multiple statements following the THEN or ELSE

if you use a colon to separate them.

Example:

u30 IF Atu 10 THEN PRINT A:GOTO 150 ELSE 10

u30 IF Atu 10 PRINT A:GOTO 150 ELSE 10

In these examples, if A does not equal 10 then both PRINT A and

GOTO 150 are executed. If A10, then control passes to 10.

You may omit the ELSE statement. If you omit the ELSE statement control

passes to the next statement.

Example:

u20 IF A10 THEN 40

u30 PRINT A

In this example, if A equals 10 then control passes to line number 40. If

A does not equal 10 line number 30 is executed.

Mode: RUN

Type: INPUT/OUTPUT

The INPUT statement allows you to enter data from the console during

program execution. You may assign data to one or more variables with a

single input statement. You must separate the variables with a

comma.

Example:

uINPUT A,B

5.4.15

Statements: IF – THEN –

ELSE (continued)

5.4.16

Statement: INPUT

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario Pagina 63