7.3 Basic Functions Settings
7-9
7
Operation
7.3.3
Software Limit Settings
Software limits are used to force the moving part of the machine to stop if it exceeds a preset limit value. If a
reference to a target position that exceeds a software limit is given during position control, the target position
in the SERVOPACK is clamped to the value of the software limit and positioning is completed. If the feedback
position exceeds a software limit during speed control or torque control, the same stopping method as for
overtravel is used to stop the motor.
(1) Software Limit Settings
The software limit function can be enabled or disabled.
Use the parameter Pn801.0 to enable the software limit function.
The software limit function can be enabled under the following conditions. Under all other circumstances, the
software limits will not be enabled even if a software limit is exceeded.
• The ZRET command has been executed.
• REFE = 1 using the POS_SET command.
Enable or disable the software limits using one of the following settings.
(2) Software Limit Setting
Set software limits value in the forward and reverse directions.
Because the limit zone is set according to the forward or reverse direction, the reverse limit must be less than
the forward limit.
Parameter
Description
When Enabled
Classification
PnA4A
n.
0
Software limits disabled in both directions.
[factory setting]
Immediately
Setup
n.
1
Forward software limit enabled.
n.
2
Reverse software limit enabled.
n.
3
Software limits enabled in both directions.
PnA4C
Forward Software Limit
Classifi-
cation
Setting Range
Setting Range
Factory Setting
Factory Setting
-1073741823 to
1073741823
1 Reference Unit
1073741823
Immediately
Setup
PnA50
Reverse Software Limit
Classifi-
cation
Setting Range
Setting Range
Factory Setting
Factory Setting
-1073741823 to
1073741823
1 Reference Unit
-1073741823
Immediately
Setup
Position
Position