Output cam transition status, Motion object configuration attributes, Motion unit configuration attributes – Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual User Manual
Page 295: Average velocity timebase
Publication 1784-UM003A-EN-P – June 2003
Motion Object Attributes 287
Output Cam Transition Status
The Output Cam Transition Status bit is set when a transition between the
currently armed and the pending Output Cam is in process. Therefore, each
Output Cam controls a subset of Output Bits. The Output Cam Transition
Status bit is reset, when the transition to the pending Output Cam is complete
or when the Output Cam is terminated by a MDOC instruction.
Motion Object
Configuration Attributes
The following sections define in more detail the behavior of all the various
configuration attributes associated with the Motion axis Object. The attributes
are, by definition, have read-write access. The Servo Object Configuration
Attributes are divided into five categories: Motion General Configuration,
Motion Units, Motion Conversion, Motion Homing, Motion Dynamics, and
Motion Instruction attributes. These categories correspond roughly to the
organization of the RSLogix 5000 Axis Properties pages.
Motion Unit Configuration
Attributes
Average Velocity Timebase
The Average Velocity Timebase attribute is used to specify the desired time in
seconds to be used for calculating the Average Velocity of the axis. When the
Average Velocity Value is requested, the value is computed by taking the total
distance traveled by the axis in the amount of time given by the Average
Velocity Timebase and dividing this value by the timebase.
The Average Velocity Timebase value should be large enough to filter out the
small changes in velocity which would otherwise result in a “noisy” velocity
value, but small enough to track significant changes in axis velocity. Typically, a
value between 0.25 and 0.5 seconds works well for most applications
GSV/SSV Access
Attribute Name
Data Type
Values
GSV
Output Cam Transition
Status
DINT
Set of Output Cam Transition Status
bits
GSV/SSV Access
Attribute Name
Data Type
Values
SSV/GSV
Average Velocity Timebase
REAL
Sec