2-Axis Speed Control - Mitsubishi Electric QD77MS User Manual

9.2.13 2-axis speed control

[QD77MS4 operation example]
Da. 8
Da. 8
Positioning start signal
[Y10]
BUSY signal
[XC,XD]
Positioning complete signal
[X14,X15]
Axis stop signal (stop command)
(Either Y4 or Y5)
In speed control flag
( Md.31 Status:b0)
In "2-axis speed control" ("[Da.2] Control method" = Forward run: speed 2, Reverse
run: speed 2), control is carried out in the 2-axis direction in which the positioning data
has been set by continuously outputting pulses for the speed set in "[Da.8] Command
speed" until the input of a stop command.
The two types of 2-axis speed control are "Forward run: speed 2" in which the control
starts in the forward run direction, and "Reverse run: speed 2" in which control starts in
the reverse run direction.
(Refer to Section 9.1.6 "Interpolation control" for the combination of the reference axis
with the interpolation axis.)
Operation chart
The following chart shows the operation timing for 2-axis (axes 1 and 2) speed
control with axis 1 as the reference axis. The "in speed control" flag ([Md.31]
Status: b0) is turned ON during speed control.
The "positioning complete signal" is not turned ON.
V
Command speed
V
Command speed
ON
OFF
OFF
OFF
OFF
OFF
Fig. 9.10 2-axis speed control operation timing
Interpolation axis (axis 2)
Reference axis (axis 1)
ON
ON
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
9 - 79
Chapter 9 Major Positioning Control
t
t
Does not turn ON even
when control is stopped
by stop command.
ON