CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
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This floating point value represents the lumped model time constant associated
with the drive device for the purposes of computing loop gains. This attribute is
used to store the original Drive Model Time Constant value for subsequent
upload. The Drive Model Time Constant Base (DMTC_Base) is computed based
on the current loop bandwidth, the velocity loop update time and the feedback
sample period according to the following formula:
DMTC_Base = 2 * 1/(2*PI*Current Loop Bandwidth(Hz)) + Velocity Loop
Update Feedback Sample Period/2
Drive Rated Peak Current
Usage
Access
T
Data
Type
Default
Min
Max
Semantics of Values
Required - All
Set
REAL
0
DB
-
-
Amps
This floating point value represents the peak current rating associated with the
drive device and used to compute peak torque and acceleration limits. This
attribute is used to store the original Drive Rated Peak Current value for
subsequent upload.
Bus Overvoltage Operational Limit
Usage
Access
T
Data
Type
Default
Min
Max
Semantics of Values
Optional - C
Set
REAL
0
DB
-
-
Volts
This floating point value represents the maximum DC Bus voltage level that can
be sustained during drive operation, which is used to calculate the factory default
value for PM Motor Rotary Bus Overvoltage Speed or the PM Motor Linear Bus
Overvoltage Speed associated with PM motor types. This attribute is used to store
the Bus Overvoltage Operational Limit value used in this calculation for
subsequent upload.
See also
Auto-Tune Configuration Attributes