Mitsubishi Electric A173UHCPU - Page 199

7. POSITIONING CONTROL
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[Program Example]
This program conducts repeated 1-axis fixed-pitch feed control under the
conditions below.
(1) System configuration
Fixed-pitch feed control of Axis 4.
M M M M
A61P
A273UH
CPU
A278
LX
Axis
1
Axis
2
Axis
3
Axis
4
A61P
AX41
Start command (X000)
MR- -B
MR- -B MR- -B
MR- -B
(2) Fixed-pitch feed control conditions
(a) The positioning conditions are shown below.
Item Setting
Servo program number No. 300
Controlled axis Axis 4
Control speed 10000
Travel value 100000
(b) Fixed-pitch feed control start command ...........leading edge of X000 (OFF→ ON)
(c) Fixed-pitch feed control end command......leading edge of X001
(OFF→ON)
(3) Operation timing
The operation timing for fixed-pitch feed control is shown below.
V
t
1 second 1 second
10000
Servo program No.300
PLC ready (M2000)
All axes servo start command
(M2042)
All axes servo start accept frag
(M2049)
Start command (X000)
SVST instruction
Axis 4 start accept flag
(M2004)
End command (X001)