
Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
189
Chapter 9 Motion Control
PTO Pulse Accuracy
Micro800 motion feature is pulse-based and the value of distance and velocity are designed in
such a way that all PTO-related values are integers at the hardware level, when converting to
PTO pulse.
For example, if the user configures Motor Pulses per Revolution as 1,000 and Travel per
Revolution as 10 cm and the user wants to drive velocity at 4.504 cm/sec. The target velocity is
4.504 cm/sec (that is, 450.4 pulse/sec). In this case, the actual commanded velocity will be
4.5 cm/sec (that is, 450 pulse/sec), and the 0.4 pulse/sec is rounded off.
This rounding scheme also applies to other input parameters such as Position, Distance,
Acceleration, Deceleration, and Jerk. For instance, with above motor revolution configuration,
setting Jerk as 4.504 cm/sec
3
is the same as setting Jerk as 4.501 cm/sec
3
, as both are
rounded off to 4.5 cm/sec
3
. This rounding applies to both axis configuration input in the
Connected Components Workbench software and function block input.
Motion Axis Parameter Validation
Besides falling within the predetermined absolute range, motion axis parameters are validated
based on relationships with other parameters. These relationships or rules are listed below.
Error is flagged whenever there is violation to these relationships.
• Lower Soft Limit should be less than the Upper Soft Limit.
• Start/Stop velocity should not be greater than the maximum velocity.
• Emergency Stop velocity should not be greater than the maximum velocity.
• Homing velocity should not be greater than the maximum velocity.
• Homing acceleration should not be greater than maximum acceleration.
• Homing deceleration should not be greater than maximum deceleration.
• Homing jerk should not be greater than maximum jerk.
• Homing creep velocity should not be greater than maximum velocity.
Delete an Axis
1. On the device configuration tree, and under Motion, right-click the axis name and select
Delete.
2. A message box appears asking to confirm deletion. Click Yes.