Software Limit - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
7.3.3

Software limit

This operation limit is based on the 0 address that becomes valid after mechanical zero return.
Specify at addresses so that activation is before forward rotation limit 1 and reverse rotation limit 1 connected
with the PLC.
1. Conditions for validating the software limit
• Specify the software limit so that the following condition is satisfied.
Large software limit > small software limit
• State with active zero return execution flag
(After execution of mechanical zero return and completion of positioning at the zero-point, or in an absolute
position detection system where the current value is established)
Note
To refrain from using the software limit, specify the software limit settings as shown below.
• Software limit (upper) = Software limit (lower)
• Software limit (upper) < Software limit (lower)
Cautions for use of software limit
1) The software limit is invalid under the following control.
a) Mechanical zero return control
b) Current value change
2) The limit error of the software limit is changed at the starting and end points of the operation. Therefore
the specified upper or lower software limit may be exceeded in circular interpolation control.
In this case, deceleration does not occur even if the software limit is exceeded.
If there is a possibility of overshoot beyond the software limit, install an external limit switch.
Y-axis stroke
limit
→ For the related parameters, control data and monitor data, refer to Section 7.9
Y-axis
Arc address
Starting point address
7 Before Starting Positioning Operation
7.3 Handling the Forward Rotation Limit and Reverse Rotation Limit
Deceleration does not occur.
End point address
X-axis
43
1
2
3
4
5
6
7
8
9
10