Restrictions When Using The Next Start - Mitsubishi Electric MELSEC-L LD75P User Manual

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Restrictions when using the NEXT start

The "NEXT start" is a instruction indicating the end of the repetitions when executing repeated start (FOR loop) (

Page 467, Section 10.3.6) and repeated start (FOR condition) ( Page 468, Section 10.3.7).

The following shows the restrictions when setting "6: NEXT start" in the " block start data".

• The processing when "6: NEXT start" is set before execution of "4: FOR loop" or "5: FOR condition" is the

same as that for a "0: block start".

• Repeated processing will not be carried out if there is no "6: NEXT start" instruction after the "4: FOR loop"

or "5: FOR condition" instruction. (Note that an "error" will not occur.)

• Nesting is not possible between "4: FOR loop" and "6: NEXT start", or between "5: FOR condition" and "6:

NEXT start". A warning "FOR to NEXT nest construction (warning code: 506)" will occur if nesting is

When nest construction is not configured

Start block data

Special start command

Normal start

Normal start

Normal start

CHAPTER 10 HIGH-LEVEL POSITIONING CONTROL

When nest construction is configured

Start block data

A warning occurs when "FOR" of 4th point is executed.

Then, destination of jump by "NEXT" of 7th point is changed to 4th point and

"NEXT" of 9th point is processed as "Normal execution".

Special start command

Normal start

Normal start

Normal start

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