Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 161)

Publication 1784-UM003A-EN-P – June 2003
Naming & Configuring Your Motion Axis 153
Hard Travel Limits
Enables a periodic test that monitors the current state of the positive and
negative overtravel limit switch inputs, when Positioning Mode is set to Linear
(in the Conversion tab of this dialog). If an axis is configured for hardware
overtravel checking and if that axis passes beyond a positive or negative
overtravel limit switch, a Positive Hard Overtravel Fault or Negative Hard
Overtravel Fault is issued. The response to this fault is specified by the Hard
Overtravel setting (in the Fault Actions tab of this dialog).
Soft Travel Limits
Enables software overtravel checking for an axis when Positioning Mode is set
to Linear (in the Conversion tab of this dialog). If an axis is configured for
software overtravel limits and if that axis passes beyond these maximum travel
limits (positive or negative), a software overtravel fault is issued. The response
to this fault is specified by the Soft Overtravel setting (in the Fault Actions tab
of this dialog). Software overtravel limits are disabled during the tuning
process.
Maximum Positive
Type the maximum positive position to be used for software overtravel
checking, in position units.
Note: The Maximum Positive limit must always be greater than the
Maximum Negative limit.
Maximum Negative
Type the maximum negative position to be used for software overtravel
checking, in position units.
Note: The Maximum Negative limit must always be less than the
Maximum Positive limit.
Position Error Tolerance
Specifies how much position error the servo tolerates before issuing a position
error fault. This value is interpreted as a +/- quantity.
For example, setting Position Error Tolerance to 0.75 position units means
that a position error fault is generated whenever the position error of the axis
is greater than 0.75 or less than -0.75 position units, as shown here: