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Chapter 4
CIP Axis Attributes
330
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
Axis Data Type
Usage
Access
Data Type
Default
Min
Max
Semantics of Values
Required -
All
GSV
USINT
-
-
-
Enumeration:
0 = Feedback
1 = Consumed
2 = Virtual
3 = Generic
4 = Servo
5 = Servo Drive
6 = Generic Drive
7 = CIP Drive
Associated tag data type for this instance of the Motion Control Axis Object.
The Axis Data Type attribute and is used to determine which data template,
memory format, and set of attributes are created and applicable for this axis
instance.
See also
Motion Control Axis Behavior Model
The Motion Control Signal Attributes associated with the axis provide access to
the current and historical position, velocity, and acceleration information of the
axis. These values may be used as part of the user program to implement
sophisticated real-time computations associated with motion control applications.
Important:
Configuration of Scaling page parameters is required for any attributes expressed in position,
velocity, or acceleration units to return meaningful values.
All Motion Control Signal Attributes support Direct Tag Access through the
Logix Designer application. Thus, a Motion Signal attribute may be directly
referenced in a program as <axis tag name>.<motion status tag name>. For
example, FeedAxis.ActualPosition.
To avoid the unnecessary processor effort associated with real-time conversion of
certain Motion Status tags that are not of interest to the user, you need to
explicitly activate real-time update of these attributes using the Auto Tag Update
attribute of the associated motion group. A subset of the Motion Control Signal
Attributes must have the Auto Tag Update attribute enabled to perform scaling
conversion. If disabled, the tag value will be forced to zero. The following
attributes are impacted:
•
Actual Position
•
Actual Velocity
Motion Control Signal
Attributes