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11 SUB FUNCTIONS
Fig. 11.4 Restart speed after speed change during speed control of speed-position switching control
Cd.7
speed value
speed at start
11.4 Software stroke limit function
11 - 5
(6) If the axis is stopped by the axis stop signal after a speed change has been
made during speed control of speed-position switching control, the speed at
a restart is as set in " Da. 5 Command speed".
V
Speed
change
command
(7) If the speed has been changed during position control (Operation pattern:
Positioning termination), depending on the distance between the speed-
changed position and the target position ( Da. 6 Positioning
address/movement amount), the work may reach " Da. 6 Positioning
address/movement amount" and stop at the point before the speed is
reduced to " Pr. 6 Bias speed at start".
v
Speed change command
New
Pr.6
Bias
ACC/DEC time
Cd.8
at speed change
(8) To change the target position after changing the speed or vise versa, refer
to "Section 11.5 Target position change function, [2] Precautions during
control".
The "software stroke limit function" is designed not to execute the movable command
to outside the setting range that has been set by the upper and lower limits of the
workpiece movable range using the address ( Md. 1 Current feed value) established by
the machine OPR control.
• The "software stroke limit function" is valid for " Md. 1 Current feed value" and " Da. 6
Positioning address/movement amount" (New current value).
• The "software stroke limit function" is made valid at an operation start and during
operation.
The upper and lower limits of the moveable range of the workpiece are set in " Pr. 1
Software stroke limit upper limit value"/ " Pr. 2 Software stroke limit lower limit value".
Restart
Stop
command
command
Cd.9
DEC/STOP time at speed change
Command speed
Da. 5
New speed value
Cd. 7
t
Stopped when positioning address
/movement amount is reached
t
MELSEC-Q
11 - 5
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