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6 POSITIONING CONTROL
(3) Even if the speed command is set as probe data by the digital oscilloscope
function, the value on digital oscilloscope does not change with “0”.
[Program]
Program for speed control (
) is shown as the following conditions.
(1) System configuration
Speed control ( ) of Axis 3.
Q61P Q02H
CPU
Q172H
CPU
Q172
LX
QX41
M
Motion CPU control module
Start/stop command (PX000)
M
Axis
1
Axis
3
AMP AMP AMP AMP
M
Axis
2
M
Axis
4
(2) Speed control ( ) conditions
(a) Speed control ( ) conditions are shown below.
Item Setting
Servo program No. No.55
Control axis Axis 3
Control speed 4000
Rotation direction Forward
(b) Speed control (
) start command ....... Turning PX000 off to on
(OFF
ON)
(c) Stop command .....…………………… Turning PX000 on to off
(ON
OFF)
(3) Operation timing
Operation timing for speed control ( ) is shown below.
t
4000
V
PLC ready flag (M2000)
All axes servo ON command
(M2042)
All axes servo ON accept flag
(M2049)
Axis 3 servo ready (M2455)
Start command (PX000)
Servo program start
Axis 3 start accept flag
(M2003)
Stop command (M3240)
Speed control by
servo program No.55
Stop command
accept