Omron CS1W-MCH71 MOTION CONTROL UNIT - 09-2004 Manual page 540

Coordinate System
100,000
−100,000
SL021A:
−2
No. of multi-turns
Unlimited Length Axis
Upper limit of the
unlimited length axis
Lower limit of the
unlimited length axis
SL021A:
−3
No. of Multi-turns
9-3-3 Software Limit
The reached position is not equivalent to the target position (see the diagram
below).
Present
Reached
position
position
−1
• Upper limit of the unlimited length axis = P5AA04 − 1
• Lower limit of the unlimited length axis = 0
P5AA04: Command unit/1 machine rotation
With the unlimited length axis, even when SL021A: No. of multi-turns is not
zero, the target position and reached position will match.
−2 −1
This is a function to provide software limit value on the coordinate system to
prevent the machine from moving outside of the specified operating range.
Normally, the limit value is set before the hardware limit sensor.
• Timing to detect the limit is only during axis movement (command output).
It is not checked before operations.
• Before exceeding the limits, the following alarms will occur to stop the
axis:
• 3005h: Positive direction software limit
Present position
0
0
Present position
0
0
Section 9-3
Time
1 2
Workpiece coordinate system>0
Machine coordinate system
1 2
Time
517