Mitsubishi Electronics QD75D Repeated start for loop, Condition data Nos. have been set Da.14

10HIGH-LEVEL POSITIONING CONTROL

10.3.6 Repeated start (FOR loop)

MELSEC-Q

In a "repeated start (FOR loop)", the data between the " block start data" in which "4:

FOR loop" is set in "

Da.13

Special start instruction" and the "block start data" in

which "6: NEXT start" is set in "

Da.13

Special start instruction " is repeatedly

executed for the No. of times set in " the No. of repetitions is set to "0".

Da.14

Parameter". An endless loop will result if

(The No. of repetitions is set in "

Da.14

Parameter" of the " block start data" in which

"4: FOR loop" is set in "

Da.13

Special start instruction".)

Section [2] shows a control example where the " block start data" and "positioning data" are set as shown in section [1].

[1]Setting examples

(1)Block start data setting example

						Da.13
Axis 1 block		Da.11		Da.12				Da.14
					Special start
start data
		Shape	Start data No.				Parameter
					instruction
1st point	1: Continue		1		4: FOR loop		2
2nd point	1: Continue		10		0: Block start			–
3rd point	0: End		50		6: NEXT start			–
•
•

The "condition data Nos." have been set in "

Da.14

Parameter".

(2) Positioning data setting example

Axis 1 position-
		Da.1
ing data No.
	Operation pattern
1	01: Continuous positioning control
2	01: Continuous positioning control
3	00: Positioning complete
•
10	11: Continuous path control
11	00: Positioning complete
•
50	01: Continuous positioning control
51	00: Positioning complete
•

[2] Control examples

The following shows the control executed when the " block start data" of the 1st point of axis 1 is set as shown in section [1] and started.

<1> Execute the axis 1 "positioning data No. 1, 2, 3, 10, 11, 50, and 51".

<2> Return to the axis 1 "1st point block start data". Again execute the axis 1 "positioning data No. 1, 2, 3, 10, 11, 50 and 51", and then stop the control.

(Repeat for the No. of times (2 times) set in Da.14 .)

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