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Chapter 4
CIP Axis Attributes
374
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
used by gearing and camming functions. Generally this value should be set to 0
since the device applies the command position according to the associated time
stamp. A non-zero value would have the effect of phase advancing or retarding the
axis position relative to a master axis.
See also
Motion Control Status Attributes
These are the motion planner output attributes associated with a Motion Control
Axis.
Planner Command Position - Integer
Usage
Access
Data Type Default
Min
Max
Semantics of Values
Required - FPV
Get/
GSV
DINT
-
-
-
Planner Counts
This attribute value is the integer component of Motion Planner generated
command position in planner counts. The command position data type is
represented internally as a 64-bit floating point value that Motion Task restricts to
a signed 32-bit integer range. The resulting range restricted Double Floating point
value can therefore be expressed as two 32-bit attributes to preserve precision. This
is accomplished by representing the command position (compos) as
x
+
y
, where
x
is the signed integer component (this attribute) and
y
is the signed floating point
fractional component.
x
and
y
are defined using the following equations:
x
= (int)compos
y
= (float)(compos –
x
)
Planner Command Position - Fractional
Usage
Access
Data Type Default
Min
Max
Semantics of Values
Required - FPV
Get/
GSV
REAL
-
-
-
Planner Counts
This attribute value is the fractional component of Motion Planner generated
command position in planner counts. Representing the command position
(compos)
x
+
y
, where
x
is the signed integer component and
y
is the signed
floating point fractional component (this attribute).
x
and
y
are defined using the
following equations:
x
= (int)compos
Motion Planner Output
Attributes
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