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Setting Up Parameters
Or the In Position window is set to 0.001 inches. If at the end of an index, the following error is calculated to be 0.0015
inches, then the InPosn output will not activate.
In Position Time
This is the amount of time in seconds that commanded motion must be complete and the absolute value of the following error
must be less than the In Position Window parameter for the InPosn output to activate. If set to zero (default), then the InPosn
output will activate as soon as motion stops and the following error is less than the In Position Window parameter.
Following Error Group
Following Error Limit Enable Check Box
Select this check box to enable (or clear this check box to disable) the Following Error Limit. If enabled, a fault will be
generated if the absolute value of the following error ever exceeds the value in the following error parameter. If disabled, a
fault will never be generated.
Following Error Limit
Following Error is the difference between the Position Command and the Position Feedback. It is positive when the Position
Command is greater than the Position Feedback. If the absolute value of the following error exceeds the value entered here,
the drive will generate a Following Error Fault (F). All accumulated Following Error will be cleared when the drive is
disabled.
The Following Error Limit is defined in user units.
Rotary Group
Rotary Rollover Enable Check Box
Select this check box to enable (or disable if check box is clear) the rotary rollover feature.
Rollover Position
This parameter is used in rotary applications and determines the position at which the internal position counter will be reset
to zero.
Example:
The user has a rotary table application with distance user units of degrees, 360.00 degrees/1 rev. The Rotary Rollover would
be set to a value of 360°.
The motor is traveling in the positive direction. As the feedback position reaches 359.999 and continues on, the feedback
position will reset (or roll-over) to zero. If the motor changes direction and travels in the negative direction, the position will
rollover at 0 to 359.999 degrees and count down. The resolution of the rotary rollover point is determined by the Distance
Units Decimal Places parameter on the User Units view in the PowerTools Pro software.
If an absolute index is used with a non-zero rotary rollover point, the FM-3/4 module will calculate the shortest path to its
destination and move in the required direction.
To force the motor to run a certain direction, use the Rotary Plus or Rotary Minus type of indexes.
Online Tab
While online with the device, the lower half of the view is the Online tab and the following real-time data will be displayed.
Motor Position Group
Position Command
This is the commanded position in user units generated by the device. This is set to zero when the Absolute Position Valid
output function is activated. The Position Command is specified in user units.
Position Feedback
This is the feedback position of the motor. It is set to zero when the Absolute Position Valid output function is activated.
Position Feedback is specified in user units.