Mitsubishi Electric A173UHCPU - Page 231

7. POSITIONING CONTROL
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[Program Example]
This program executes speed-switching control under the conditions below.
(1) System configuration
Speed-switching control of Axis 2 and Axis 3.
Axis
2
A61P A273UH
CPU
A278
LX
M
Axis
1
M M M
A61P AX41
Start command(X000)
MR- -B MR- -B MR- -B MR- -B
Axis
3
Axis
4
(2) Positioning conditions
(a) The speed-switching control conditions are shown below.
Item Setting
Servo program number No. 500
Controlled axis Axis 2 Axis 3
End address 100000 50000
(b) Speed-switching control start command....... leading edge of X000
(OFF → ON)
(3) Operation timing and speed-switching positions
The operation timing for speed-switching control and the speed-switching
points are shown below.
40000
50000
70000
100000
V
t
2000
5000
8000
Axis 2 positioning
direction
Axis 3 positioning direction
ON
ON
ON
ON
OFF
OFF
OFF
OFF
PLC ready(M2000)
Start command(X000)
SVST instruction
Axis 2 start accept flag(M2002)
Axis 3 start accept flag(M2003)