Yaskawa MP920 User's Manual Design - Manual (Page 426)

8.5 Software Limit Function
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8.5 Software Limit Function
The software limit function is used to set upper and lower limits in fixed parameters for machine
system range of movement so the controller can constantly monitor the operating range of the
machine. The function prevents machine runaway or damage due to incorrect operation as well
as incorrect references in a motion program.
• The following fixed parameters must be set in order to use the software limit function.
• Set the positive and negative software limits for a machine coordinate system.
• The machine coordinate system is determined by returning to the zero point.
• The software limit function is implemented after the machine returns to the zero point.
Parameter
No.
Name Units Remarks
17 Servo Module Function Selection
Flags
b7: Positive Software Limit Selection
b8: Negative Software Limit Selec-
tion
−
0: Disabled,
1: Enabled
0: Disabled,
1: Enabled
25 Positive Software Limit 1 = 1 refer-
ence unit -2147483648 to
2147483647
26 Negative Software Limit 1 = 1 refer-
ence unit -2147483648 to
2147483647
Overtravel in the
reverse direction Overtravel in the
forward direction
Positive software limit (Distance traveled) Negative software limit