Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 9 Major Positioning Control
9.2.12 1-axis speed control
In "1-axis speed control" ("
Da.2
Control system" = Forward run: speed 1, Reverse
run: speed 1), control is carried out in the 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 1-axis speed control are "Forward run: speed 1" in which the control
starts in the forward run direction, and "Reverse run: speed 1" in which control starts in
the reverse run direction.
Operation chart
The following chart shows the operation timing for 1-axis 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.
[QD77MS4 operation example]
t
V
BUSY signal
OFF
ON
Positioning start signal
OFF
ON
Positioning complete signal
OFF
Axis stop signal
(stop command) [Y4]
OFF
ON
Does not turn ON even
when control is stopped
by stop command.
OFF
ON
( Md.31 Status:b0)
In speed control flag
Da. 8 Command speed
[Y10]
[XC]
[X14]
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
Fig.9.9 1-axis speed control operation timing