Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018 399
that Bus Overvoltage protection be provided through a resistive brake module or
DC bus regulation device to avoid drive damage.
Specifically, the PM Motor Extended Speed Permissive determines if the Bus
Overvoltage Speed is applied to the velocity limiter function. The Bus Overvoltage
Speed is only applied to the velocity limiter if the PM Motor Extended Speed
Permissive is False.
The PM Motor Extended Speed Permissive value also determines the values of the
Motor Overspeed Factory Limit and Motor Overspeed User Limit that provide
overspeed protection. If the PM Motor Extended Speed Permissive is False, the
Motor Overspeed Limits will be based on the Bus Overvoltage Speed. If the PM
Motor Extended Speed Permissive is True, the Motor Overspeed Limits will be
based on the Max Extended Speed value.
See also
General Motor Attributes on page 389
Induction Motor Attributes on page 401
Linear PM Motor Attributes on page 404
Motor Attributes on page 57
Rotary PM Motor Attributes on page 412
These are the motor configuration attributes that apply specifically to rotary
motor types.
Rotary Motor Poles
Usage Access Data
Type
Default Min Max Semantics of Values
Required Set/GSV UINT PM: 8
IM: 4
DB
2 max int
The Rotary Motor Poles attribute is an integer that specifies the number of poles
per revolution for rotary motors. This value is always an even number, as poles
always exist in pairs.
Rotary Motor Inertia
Usage Access Data
Type
Default Min Max Semantics of Values
Optional Set/SSV# REAL 0
DB
0
Inertia Units
Attributes
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