Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011 19
Detailed Drive Operation Chapter 1
Autotune
Auto-tuning is a procedure that involves running a group of tests on the motor/
drive combination. Some tests are checking the drive hardware while others
configure the drive parameters to maximize the performance of the attached
motor.
The auto-tuning procedure can be done using the Start-Up menu on the HIM.
Autotune - Start-Up Menu
The Start-Up menu prompts the user for information and yes/no responses as
required. The “Motor Control,” “Motor Data,” “Feedback Configuration,”
“Power Circuit Test,” “Direction Test,” “Motor Tests,” and “Inertia Measure”
submenus of the Start-Up menu are all related to the autotuning of the drive/
motor combination and are covered in this section.
Motor Control
The Motor Control submenu asks you to select the motor control operating
mode which sets the parameter 485 [Motor Ctrl Mode]. Choices are “FOC,”
“FOC 2,” “Pmag Motor,” “V/Hz” and “Test.”
• “FOC” selects field oriented control. This should be the selection for AC
squirrel cage induction motors.
• “FOC 2” selects field oriented control and is only used for a specific type of
AC induction motor with motor thermal feedback.
• For Phase II control V2.003 or later, “V/Hz” selects volts per hertz control.
• “Pmag Motor” selects control for permanent magnet motors.
• “Test” puts the drive in a test mode to perform the direction test. “Test” is
automatically selected during the direction test portion of the Start-Up
routine, and does not need to be set manually by the user.
Next, the motor control submenu asks you to select whether you have no
dynamic braking, an internal resistor for dynamic braking, or an external resistor
for dynamic braking. When no dynamic braking is selected, the bus regulator is
turned on (see Bus Regulation/Braking
on page 22 of this manual for more
details).
Motor Data
This submenu asks you to enter whether the motor power is in units of kW or
Hp. Then you are prompted to enter the motor nameplate data. Accurate motor
nameplate data is important for tuning the drive to the connected motor.
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