Mitsubishi Electric QD77MS User Manual page 577

Changing the speed control command speed
In "position-speed switching control", the speed control command speed can be
changed during the position control.
(1) The speed control command speed can be changed during the position control
(2) The "new command speed" is stored in "[Cd.25] Position-speed switching
Position-speed switching control start
Position-speed switching
signal
Position-speed
Cd.25
switching control
speed change register
Position-speed switching
latch flag
( Md.31 Status: b5)
Stop signal
POINTS
 The machine recognizes the presence of a command speed change request when the data is
written to "[Cd.25] Position-speed switching control speed change register" with the sequence
program.

The new command speed is validated after execution of the position-speed switching control before
the input of the position-speed switching signal.
 The command speed change can be enabled/disabled with the interlock function in speed control
using the "position-speed switching latch flag" ([Md.31] Status: b5) of the axis monitor area.
of position-speed switching control.
A command speed change request will be ignored unless issued during the
position control of the position-speed switching control.
control speed change register" by the sequence program during position
control.
This value then becomes the speed control command speed when the
position-speed switching signal turns ON.
Position
control
Speed change
enable
OFF
0 V2
ON
OFF
OFF
Fig. 9.20 Speed control speed change timing
9 - 119
Chapter 9 Major Positioning Control
Speed
control
Position control start
ON
Setting after the position-speed
switching signal ON is ignored.
V3
V2 becomes the speed control command speed.
ON
OFF
ON
t