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CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
291
Motor Extended Speed Permissive is False, the Rotary Motor Overspeed Factory
Limit will be based on the PM Motor Rotary Bus Overvoltage Speed. If the PM
Motor Extended Speed Permissive is True, the Rotary Motor Overspeed Factory
Limit will be based on the PM Motor Rotary Max Extended Speed value.
For Rockwell Automation drives, when PM Motor Extended Speed Permissive is
False, the Motor Overspeed Factory Limit = 1.25 * Bus Overvoltage Speed, or the
speed limit corresponding to the Bus Overvoltage Factory Limit, whichever is less.
When PM Motor Extended Speed Permissive is True, the Motor Overspeed
Factory Limit = 1.25 * Max Extended Speed value.
The Operational Speed Limit on all Rockwell Automation drive products is 600
Hz. The following formula is used to calculate the operational speed limit:
Operational Speed Limit (RPM) = 590 (Hz) * 120 / Rotary Motor Poles
Linear Motor Overspeed Factory Limit
Usage
Access
Data Type
Default
Min
Max
Semantics of Values
Optional - D
Get/GSV
REAL
-
-
-
m/s
Returns the Factory Limit for the Motor Overspeed Factory Limit exception
based on a factory set value determined by the Linear Motor Rated Speed or
Linear Motor Max Speed attribute values, or by operational speed limits enforced
by the drive vendor. The drive may take the minimum of any of these values as the
Factory Limit.
When PM Motor Linear Bus Overvoltage Speed and PM Motor Linear Max
Extended Speed attributes are supported and non-zero, the drive uses these values
to determine the Linear Motor Overspeed Factory Limit. The PM Motor
Extended Speed Permissive value determines which limit to apply. If the PM
Motor Extended Speed Permissive is False, the Linear Motor Overspeed Factory
Limit will be based on the PM Motor Linear Bus Overvoltage Speed. If the PM
Motor Extended Speed Permissive is True, the Linear Motor Overspeed Factory
Limit will be based on the PM Motor Linear Max Extended Speed value.
For Rockwell Automation drives, when PM Motor Extended Speed Permissive is
False, the Motor Overspeed Factory Limit = 1.25 * Bus Overvoltage Speed, or the
speed limit corresponding to the Bus Overvoltage Factory Limit, whichever is less.
When PM Motor Extended Speed Permissive is True, the Motor Overspeed
Factory Limit = 1.25 * Max Extended Speed value
See also