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CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
263
Application Type
Kpi
Kvi
iHold
Basic
no
no
no
Tracking
no
yes
no
Point-Point
yes
no
yes
Const. Spd.
no
yes
no
The next table shows which Feedforward values are applicable based on the
Application Type. Separate bits are defined in the Gain Tuning Configuration
Bits attribute to enable tuning of Velocity Feedforward, Kvff, and Acceleration
Feedforward, Kaff.
Application Type
Kvff
Kaff
Custom
-
-
Basic
yes
no
Tracking
yes
yes
Point-Point
no
no
Const. Spd.
yes
no
Finally, the Torque Low Pass Filter bit enables tuning of the Torque Low Pass
Filter Bandwidth. This bit is set for all Application Types except Custom,
Application Type
Torque LP Filter
Custom
-
Basic
yes
Tracking
yes
Point-Point
yes
Const. Spd.
yes
If Application Type is set to Custom, individual gain calculations can be
controlled directly by the user by changing the bit settings in the Gain Tuning
Configuration Bits attribute. If the Application Type is not Custom, these bit
settings may not be altered, thus maintaining the fixed relationship to the
Application Type as defined in the preceding tables.
Loop Response
Usage
Access
T Data
Type
Default
Min
Max
Semantics of Values
Required - PV
Set/GSV
USINT
1
-
-
Enumeration:
0 = Low
1 = Medium
2 = High
3-255 = Reserved