7. POSITIONING CONTROL
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[Program Example]
This program conducts speed control (II) under the conditions below.
(1) System configuration
Speed control (II) of Axis 3.
M M
A61P
A273UH
CPU
A278
LX
Axis
1
Axis
2
Axis
3
Axis
4
A61P
AX41
Start/stop command (X000)
MR- -B
MR- -B MR- -B
MR- -B
(2) Speed control (II) conditions
(a) The speed control (II) conditions are shown below.
Item Setting
Servo program number No. 55
Controlled axis Axis 3
Control speed 4000
Rotation direction Forward
(b) Speed control (II) start command.......leading edge of X000
(OFF → ON)
(c) Speed control (II) stop command .......trailing edge of X000
(ON → OFF)
(3) Operation timing
The operation timing for speed control (II) is shown below.
V
4000
t
Stop command
received
Speed control by
servo program No.55
PLC ready (M2000)
All axes servo start command
(M2042)
All axes servo start accept flag
(M2049)
Start command (X000)
SVST instruction
Axis 3 start accept flag
(M2003)
Stop command (M3240)
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