Mitsubishi Electronics QD75MH2 ユーザーズマニュアル

 
 

 

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MELSEC-Q

 

10   HIGH-LEVEL POSITIONING CONTROL 

 

10.3.8 Restrictions when using the NEXT start 

The "NEXT start" is a instruction indicating the end of the repetitions when executing 
Section 10.3.6 "Repeated start (FOR loop)" and Section 10.3.7 "Repeated start (FOR 
condition)".  

 

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

 

(1)  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".  

 

(2)  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.) 

 

(3)  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 attempted.  

 

Block start data 

 Da.13   

Special start instruction 

 

 

1st point 

Block start 

 

 

2nd point 

FOR 

 

 

3rd point 

Block start 

 

 

4th point 

FOR 

5th point 

Block start 

6th point 

Block start 

7th point 

NEXT 

8th point 

Block start 

9th point 

NEXT 

•

 

 

•

 

 

The JUMP destination of the
NEXT designated with points
7 and 9 is the FOR of point 4.
A warning will occur if the NEXT
designated with point 9 is
executed.