Software Stroke Limit Function - Mitsubishi Electric MELSECQ Series User Manual

11 SUB FUNCTIONS
Fig. 11.4 Restart speed after speed change during speed control of speed-position switching control

11.4 Software stroke limit function

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(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
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".
The details shown below explain about the "software stroke limit function".
[1] About movable range
[2] Software stroke limit check details
[3] Relation between the software stroke limit function and various controls
[4] Precautions during software stroke limit check
[5] Setting the software stroke limit function
[1] About movable range
The following drawing shows the moveable range of the workpiece when the
software stroke limit function is used.
Limit switch for
emergency stop
Pr. 2 Software stroke limit lower limit value
Fig. 11.5 Workpiece moveable range
search engine
Restart
Stop
command
command
Workpiece moveable range
Pr. 1 Software stroke limit upper limit value
MELSEC-Q
Da. 5 Command speed
Cd. 7 New speed value
t
Limit switch for
emergency stop
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