Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 653)

100

101

Paramacros

Chapter 20

20-9

UnconditionalGOTO

Use the unconditional GOTO command to automatically transfer control

any time that the GOTO block is executed.

The format for the GOTO command is:

GOTO n;

Where: Specifies:

n the sequencenumber oftheblock towhich executionis transferredwhen the

GOTO blocki s executed.

Example 20.7

Un-conditional GOTO

N1...;

N2...;

N3GOTO5;

N4...;

N5...;

N6...;

/N7GOTO1;

In Example 20.7, execution continues sequentially until block N3 is read.

Execution then transfers to block N5 and again resumes sequential

execution to block N6. If optional block skip 1 is off, block N7 transfers

execution back to block N1.

Conditional IF-GOTO

The conditional IF-GOTO command is dependent on whether a

mathematical condition is true. If the condition is true, execution transfers

to the block specified.

Format for the IF-GOTO command is:

IF [(condition)] GOTO n;

Where: Specifies:

(condition) someconditional expression (seepage 20-7for details). This condition istested

bythecontrolto determineif itis trueorfalse.

n theblock towhichexecutionistransferredifthe conditionis tested astrue.

If the condition is tested as false, execution falls through the block and the

GOTO is not executed. Program execution continues in a normal fashion.

20.2.2

GOTO and IF-GOTO

Commands

1 2 ... 648 649 650 651 652 653 654 655 656 657 658 ... 819 820

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