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9 MAJOR POSITIONING CONTROL
9.2.13 2-axis speed control
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
In "2-axis speed control" ("
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 "
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
Status: b0
Fig. 9.10 2-axis speed control operation timing
Da.2
Control system" = Forward run: speed 2, Reverse
Interpolation axis (axis 2)
Referense axis (axis1)
ON
ON
9 - 70
t
t
Does not turn ON even
when control is stopped
by stop command.
ON
MELSEC-Q
Da.8
Command
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Troubleshooting
