Allen-Bradley ControlLogix Reference Manual

Chapter 4
CIP Axis Attributes
406 Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
When the extended speed range of a PM motor is permitted (PM Motor Extended
Speed Permissive is True) the PM Motor Linear Max Extended Speed attribute
value can be used to limit the speed of a linear motor to protect the motor or load
from damage due to an overspeed condition.
When configured for Position Loop or Velocity Loop operation, this overspeed
protection includes limiting the magnitude of the velocity reference value allowed
into the velocity summing junction using the velocity limiter function. If the
signal entering the velocity limiter exceeds this velocity limit value, the velocity
limiter clamps the velocity reference to this value and sets the Velocity Limit status
bit. If the value of this attribute is 0, this limit is not applied.
When the extended speed range of a PM motor is permitted, overspeed protection
is also provided through motor overspeed detection based on the Motor
Overspeed Factory Limit and Motor Overspeed User Limit. Exceeding these
limits results in a Motor Overspeed FL or UL Axis Exception. Overspeed
detection is the only source of protection when the axis is configured for Torque
Loop operation.
If the related optional attribute, Rotary or Linear Motor Max Speed, is supported,
software will apply this maximum speed value as the Max Value for this attribute.
See also
General Permanent Magnet Motor Attributes on page 396
General Rotary Motor Attributes on page 399
General Linear Motor Attributes on page 388
Induction Motor Attributes on page 401
Velocity Loop Signal Attributes on page 228
The following attribute tables list the motor configuration attributes that apply
only to Interior Permanent Magnet (IPM) motor types.
PM Motor Lq Flux Inductance
Usage Access Data
Type
Default Min Max Semantics of Values
Required - D SSV REAL 0
DB
0 - Henries
A floating point value that specifies the phase-to-neutral, q-axis, inductance of an
interior permanent magnet motor.
Interior Permanent Magnet
Motor Attributes

Allen-Bradley ControlLogix Specifications

General

Brand	Allen-Bradley
Model	ControlLogix
Category	Industrial Electrical
Language	English