Rockwell Automation Publication 750-RM100A-EN-P - August 2019 29
Secondary Motor Control Chapter 4
Application Use Cases
Secondary Motor Control profiles can be used for various applications.
Applications that require one drive to control two different-sized motors
independently, multi-axis storage and retrieval systems, or single motor to multi-
motor are several examples that can leverage the two motor control profiles.
One Drive, Two Independent Motors
You can use the Secondary Motor Control profile to change motor size without
the need to reprogram the drive. In this example, one PowerFlex 755T drive is
used to control a 100 Hp motor, but can be electrically switched over to a 150 Hp
motor. The primary motor control profile is configured with the 100 Hp motor
characteristics and tuning requirements. The secondary motor control profile is
configured with the 150 Hp motor characteristics and tuning requirements.
The drive is configured to switch between the primary and secondary motor
control profiles that are based on which contactor is closed and electrically
connected to the specified motor.
Figure 12 - One Drive, Two Independent Motors
PowerFlex 755T Drive
Port 10
Pri Mtr Ctrl
100 Hp
Port 11
Sec Mtr Ctrl
150 Hp
Power Structure
100 Hp 150 Hp
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