Mitsubishi Electric MELSEC-Q Series - Page 101

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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.
Use this pointer to confirm which positioning data is to be updated using the
Motion SFC program.
Also, store the positioning data updated last time to the end of a selected device
to use as an updated data set pointer for checking the extent to which the
positioning data has been updated.
Data set pointer for constant-speed control and updated data set pointer are
described here using the example servo program below.
CPSTART2
Axis
Axis
Speed
FOR-TIMES
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
ABS-2
Axis
Axis
NEXT
<K 0>
1
2
1,
2,
1,
2,
1,
2,
1,
2,
1,
2,
1,
2,
1,
2,
1,
2,
1,
2,
D3200
D3000
D3002
D3004
D3006
D3008
D3010
D3012
D3014
D3016
D3018
D3020
D3022
D3024
D3026
D3028
D3030
D3032
D3034
10
*
1
2
3
4
5
6
7
8
9
*
10
. . . 0
. . . 1
. . . 2
. . . 3
. . . 4
. . . 5
. . . 6
. . . 7
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 :
Pass point
. . . 8
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.