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Rockwell Automation Publication 2198-UM002E-EN-P - February 2018
Appendix D
Motor Control Feature Support
Once rated flux is reached in the motor, normal operation can begin and the
desired acceleration profile achieved.
Figure 170 - Rated Flux Reached
Flux Up Attributes
FluxUpControl Attribute
When the motion axis is enabled, DC current is applied to an induction motor
to build stator flux before transitioning to the Running state. This attribute
controls how an induction motor is to be fluxed in the Starting state prior to
transitioning to the Running state.
Table 157 - FluxUp Control Delay Methods
FluxUpTime Attribute
When FluxUpControl is configured for Manual Delay, this attribute sets the
length of delay time to fully flux the motor before transitioning to the Running
state.
Stator Voltage
Rotor Speed
Motor Flux
Stator Frequency
Flux Up
Voltage
Time
Flux Up
Normal Operation
IR Voltage - SVC
Greater of IR Voltage or
Voltage Boost - V/Hz
ID
Access
Attribute
Conditional Implementation
558
Set
Flux Up Control
Ind Motor only
0 = No Delay
1 = Manual Delay
2 = Automatic Delay
559
Set
Flux Up Time
(1)
(1) This is the time designated for the Manual Delay setting. This attribute is not supported by the Automatic delay method. The
flux-up feature is disabled if FluxUpControl is set to Manual Delay and FluxUpTime is set to 0.
Ind Motor only
Units: Seconds
Default: 0.0000
Min/Max: 0.0000 / 1000.00
Delay Method
Description
No delay
The axis transitions immediately to the Running state while the motor flux is building.
Manual delay
The axis remains in the Starting state while the motor stator flux is building according to the
Flux Up Time attribute.
Automatic delay
The drive determines the amount of delay time to fully flux the motor based on the motor
configuration attribute data or measurements.