3 POSITIONING DEDICATED SIGNALS

(12) Data set pointer for constant-speed control (D15+20n)

....…….. Monitor device

This pointer is used in the constant-speed control when specifying positioning data indirectly and substituting positioning data during operation.

It stores a "point" that indicates which of the values stored in indirect devices has been input to the Motion CPU when positioning is being repeated by using a repetition instructions (FOR-TIMES, FOR-ON or FOR-OFF).

Use this pointer in conjunction with the updated data set pointer (controlled by the user in the Motion SFC program) - which indicates the extent to which the positioning data has been updated using the Motion SFC program - to confirm which positioning data is to be updated.

Data set pointer for constant-speed control and updated data set pointer are described here using the example servo program below.

Pass point

<K 0>

 

9 CPSTART2

 

Axis

1

Axis

2

Speed

D3200

*FOR-TIMES

1

ABS-2

1,

. . . 0

 

Axis

D3000

 

Axis

2,

D3002

2

ABS-2

 

. . . 1

 

Axis

1,

D3004

 

Axis

2,

D3006

3

ABS-2

 

. . . 2

 

Axis

1,

D3008

 

Axis

2,

D3010

4

ABS-2

 

. . . 3

 

Axis

1,

D3012

 

Axis

2,

D3014

5

ABS-2

 

. . . 4

 

Axis

1,

D3016

 

Axis

2,

D3018

6

ABS-2

 

. . . 5

 

Axis

1,

D3020

 

Axis

2,

D3022

7

ABS-2

 

. . . 6

 

Axis

1,

D3024

 

Axis

2,

D3026

8

ABS-2

 

. . . 7

 

Axis

1,

D3028

 

Axis

2,

D3030

*NEXT

9 CPEND

Point

Repetition instructions

FOR-TIMES

FOR-ON

FOR-OFF

NEXT

0, 1, 2, etc., starting from the first instructions defined by the above repetition instructions :

The input situation of positioning data to the Motion CPU is shown the next page by executing the 2-axes constant-speed control using above the servo program and updating the positioning data in indirect devices D3000 to D3006.

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