Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 655)

100

101

Paramacros

Chapter 20

20-11

All blocks between the DO and the END command are executed

indefinitely or until execution is transferred to some block out of the loop

or stopped by some external operation such as pressing <CYCLE STOP>

<E-STOP>.

Conditional WHILE-DO -END

The conditional WHILE-DO-END command is dependent on whether a

mathematical condition is true. If this condition is false, execution

transfers to the block immediat ely following the END statement block.

The format for the WHILE-DO-END command is:

WHILE [ (condition) ] DO m;

;

END m;

Where: Is :

(condition) somecondition expression (seepage 20-7fordetails). This conditionistested

bythecontrolto determineif itis trueorfalse.

m an identifierusedby the control torelateaDO blockwith an ENDblock. The

valueofm mustbe the samefor theDO andthecorrespondingEND. This value

canbeeither1,2,or 3.

All blocks between the DO and the END command are executed until the

condition is tested as false. This set of blocks is referred to as a

WHILE-DO-END program segment.

When the condition for the WHILE-DO block is tested as false, execution

is transferred to the block immediately following the END statement block.

Example 20.9 illustrates the use of the WHILE-DO-END block.

Example 20.9

WHILE-DO-END Program Segment

N1 #1=1;

N2WHILE[#1LT10]DO1

N3#1=[#1+1];

N4...;

N5...;

N6END1;

N7...;

1 2 ... 650 651 652 653 654 655 656 657 658 659 660 ... 819 820

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 655

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