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ASDA-A3
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Motion Control
Speed command Speed command (I) Speed command
When the PR executor receives three consecutive Speed commands with an interrupt in the
second command, the executor treats the first and the second as one PR group. Since the first
Speed command is not executed, the executor replaces the first command with the second. It
only sends the second command to the motion command generator for execution. After the
second command is complete, the executor sends the third command to the generator (see
Figure 7.1.6.8 (a)).
If the first command includes a delay, then the PR executor sends the first command to the
generator and then starts counting the delay time. After the delay is over, it then sends the
second command and the generator starts the second part of speed control. While the first
command is still being executed, it is integrated with the second command. Once the second
command is complete, the executor sends the third to the generator for execution (see Figure
7.1.6.8 (b)).
(
1 ms command cycle
) (1 ms command cycle)
PR#1
PR#2 (I)
PR#3
PR
executor
Speed
DLY=[0] 0 ms
100 rpm
Acc=[11] 100 ms
Dec=[11] 100 ms
Speed
DLY=[0] 0 ms
200 rpm
Acc=[12] 333 ms
Dec=[12] 333 ms
Speed
DLY=[0] 0 ms
500 rpm
Acc=[0] 33.3 ms
Dec=[0] 33.3 ms
7
Motion
command
generator
Speed (rpm)
500
200
PR
executor
(a) Speed command without delay
(1 ms Cmd cycle)
PR#1
Speed
DLY=[1] 100 ms
100 rpm
Acc=[11] 100 ms
Dec=[11] 100 ms
(1 ms Cmd cycle)
PR#2 (I)
Speed
DLY=[0] 0 ms
200 rpm
Acc=[12] 333 ms
Dec=[12] 333 ms
(1 ms Cmd cycle)
PR#3
Speed
DLY=[0] 0 ms
500 rpm
Acc=[0] 33.3 ms
Dec=[0] 33.3 ms
Time
Motion
command
generator
Speed (rpm)
500
200
100
100 ms
(b) Speed command with delay
Figure 7.1.6.8 Internal interruption - Speed command
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Time
7-57