CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
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•
Unwind = Conversion Constant * (Unwind Num/Unwind Denom)
Limited Travel:
•
Max Resolution = Int((2^31-1) * (Pos Scaling Num/Pos Scaling Denom) /
Travel Range)
•
Base Resolution = Minimum (Default Motion Resolution, Max
Resolution)
•
Motion Resolution = Pos Scaling Num * (10^(Int (Log10(Base
Resolution/Pos Scaling Num))))
•
Conversion Constant = Motion Resolution * (Pos Scaling Denom/Pos
Scaling Num)
Unlimited Travel:
•
Base Resolution = Default Motion Resolution
•
Motion Resolution = Pos Scaling Num * (10^(Int (Log10(Base
Resolution/Pos Scaling Num))))
•
Conversion Constant = Motion Resolution * (Pos Scaling Denom/Pos
Scaling Num)
When Scaling Calculations are performed, Logix Designer application sets the
Scaling Source to "from calculator". If any of the Scaling Factor attributes is
changed directly by the user either through Logix Designer or through
programmatic access, Scaling Source is set to "direct entry". The "direct entry"
setting indicates that the Scaling Factors are no longer consistent with the current
Scaling attribute values.
Travel Mode
Usage
Access
Data Type
Default
Min Max
Semantics of Values
Required - All
Set/ SSV#
USINT
0
-
-
Enumeration:
0 = Unlimited
1 = Limited (E)
2 = Cyclic (E)
3-255 = reserved
#
Indicates the attribute cannot be set while the tracking command (Tracking Command bit in CIP Axis Status is true).
Enumerated attribute used to determine the travel constraints of the axis.
Unlimited travel is for axes that run continuously without limit but are not cyclic.
Limited travel is for axes that have imposed limits to their travel, usually due to
mechanical limitations. Cyclic travel is for axes whose position repeats as part of a
product cycle. While the axis may run continuously, the position value is bound
between 0 and the Position Unwind value. If the Feedback Configuration = No