86 EZMotion User/Programming Guide
www.controltechniques.com Revision: A8
Software Travel Limit Minus
If the absolute position is less than or equal to this value the Software Travel Limit Minus Activate shall activate.
A rising edge occurs when the absolute position is less than or equal to the parameter Software Travel Limit -. A falling edge will be
generated as soon as the above is not true.
Rotary
Enable Rotary Rollover
Select this check box to enable (or disable if clear) the rotary rollover feature.
Rotary 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 EZMotion 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.
8.4.8 Velocity View
The Velocity view allows the user to define parameters related to the velocity control of EZMotion. Figure 86 shows an example of
the Velocity view.
Figure 86: Velocity View
Feedrate Override
This parameter is used to scale all motion. It can be described as scaling in real time. The default setting of 100% will allow all
motion to occur in real time. A setting of 50% will scale time so that all moves run half as fast as they do at 100%. A setting of 200%
will scale time so that all moves run twice as fast as they would at 100%. FeedRate Override is always active and affects all motion,
including accels, decels, dwells, and synchronized motion. This parameter may be modified via Modbus or in a program.
Feedrate Accel/Decel
The FeedRate Decel/Accel parameter specifies the ramp used when velocity changes due to a change in the FeedRate Override
value. The units of feedrate decel/accel are Seconds/100% of FeedRate. Therefore, the user must specify the amount of time (in
seconds) to accelerate or decelerate 100% of FeedRate.
8.4.9 Ramps View
The Ramps view allows the user to define various accel/decel ramps used under typical application conditions. Figure 87 shows an
example of the Ramps view.
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