Allen-Bradley ControlLogix Reference Manual

CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018 331
• Actual Acceleration
• Master Offset
• Command Position
• Command Velocity
• Command Acceleration
• Average Velocity
The following are the signal attributes associated a Motion Control Axis:
Actual Position
Usage Access T Data
Type
Default Min Max Semantics of Values
Required - All Get/GSV T REAL - - - Position Units
Tag access is supported by the
value is valid only when Auto Tag
Update of the Motion Group
Object is enabled.
The Actual Position attribute is the current absolute position of an axis, in the
configured Position Units of that axis. This value is based on data reported to the
Logix Processor as part of an ongoing synchronous data transfer process which
results in a delay of one Coarse Update Period. Thus, the Actual Position value
that is obtained is the actual position of the axis one Coarse Update Period ago.
Tag access supported but value is valid only when Auto Tag Update of the Motion
Group Object is enabled.
Strobe Actual Position
Usage Access T Data
Type
Default Min Max Semantics of Values
Required - All Get/GSV T REAL - - - Position Units
Strobe Command Position
Usage Access T Data
Type
Default Min Max Semantics of Values
Required - FPV Get/GSV T REAL - - - Position Units
Strobe Actual Position and Strobe Command Position attributes are used to
simultaneously store a snap-shot of the actual, command position, and master
offset position of an axis when the MGSP (Motion Group Strobe Position)
instruction is executed. The values are stored in the configured Position Units of
the axis.

Allen-Bradley ControlLogix Specifications

General

Brand	Allen-Bradley
Model	ControlLogix
Category	Industrial Electrical
Language	English