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10 ADVANCED POSITIONING CONTROL

10.3.9 Restrictions when using the NEXT start

The "NEXT start" is a command indicating the end of the repetitions when executing
section "10.3.7 Repeated start (FOR loop)" and section "10.3.8 Repeated start (FOR
condition)".

The following shows the restrictions when setting "7: NEXT start" in the "start block
data".

(1) The processing when "7: NEXT start" is set before execution of "5: FOR loop" or

"6: FOR condition" is the same as that for a "0: normal start".

(2) Repeated processing will not be carried out if there is no "7: NEXT start"

command after the "5: FOR loop" or "6: FOR condition" command. (Note that an
"error" will not occur.)

(3) Nesting is not possible between "5: FOR loop" and "7: NEXT start", or between

"6: FOR condition" and "7: NEXT start". A warning "FOR to NEXT nesting
structure" (warning code: 506) will occur if nesting is attempted.

[Operating examples without nesting structure] [Operating examples with nesting structure]

Start block data

Da.12 Special start

command

Start block data

Da.12 Special

start command

1st point

Normal start

1st point

Normal start

2nd point

FOR

2nd point

FOR

3rd point

Normal start

3rd point

Normal start

4th point

FOR

5th point

Normal start

5th point

Normal start

6th point

Normal start

6th point

Normal start

7th point

FOR

7th point

8th point

Normal start

8th point

Normal start

9th point



A warning will occur when starting the 4th

point "FOR".
The JUMP destination of the 7th point "NEXT"
is the 4th point. The 9th point "NEXT" is
processed as normal start.