User Manual Instruction Manual

13-2 GV6000 AC Drive User Manual
To avoid operational conflict between User Set values, all digital inputs must be set
identically in each user set. If the digital inputs in each user set are not set identically,
a Type 2 alarm is generated. The condition(s) must be corrected before the drive can
become active.
Load Frm Usr Set (198) and Save to User Set (199) commands are not permitted in
Dynamic Mode because these operations define data transfer between the active
memory and the User Sets.
Disabling Dynamic Mode will cause the drive to operate in Normal Mode and
parameter values will be transferred from operating memory into the active
non-volatile storage area
.
13.2 Autotune Procedures
13.2.1 Parameters Determined by Autotune
Flux Current Ref (63) is set by the flux current test. Flux current is the reactive
portion of the motor current (portion of the current that is out of phase with the motor
voltage) and is used to magnetize the motor. The flux current test is used to identify
the value of motor flux current required to produce rated motor torque at rated current.
When the flux test is performed, the motor will rotate. The drive accelerates the motor
to approximately two-thirds of base speed and then coasts for several seconds.
IR Voltage Drop (62) is set by the IR voltage drop test. IR Voltage Drop (62) is used
by the IR Compensation procedure to provide additional voltage at all frequencies to
offset the voltage drop developed across the stator resistance. An accurate
calculation of the IR Voltage Drop will ensure higher starting torque and better
performance at low speed operation. The motor should not rotate during this test.
Ixo Voltage Drop (64) is set by the leakage inductance test. This test measures the
inductance characteristics of the motor. A measurement of the motor inductance is
required to determine references for the regulators that control torque. The motor
should not rotate during this test.
Total Inertia (450) is set by the inertia test. Total Inertia (450) represents the time in
seconds, for the motor coupled to a load to accelerate from zero to base speed at
rated motor torque. During this test, the motor is accelerated to about 2/3 of base
motor speed. This test is performed during the Start-up mode, but can be manually
performed by setting [Inertia Autotune] to “Inertia Tune”. The Total Inertia (450) and
Speed Desired BW (449) automatically determine the Ki Speed Loop (445) and Kp
Speed Loop (447) gains for the speed regulator.
13.2.2 Autotune Procedure for Sensorless Vector and Economizer
The purpose of Autotune (61) is to identify the motor flux current and stator resistance
for use in Sensorless Vector Control and Economizer modes.
Motor nameplate data must be entered into the following parameters for the Autotune
procedure to obtain accurate results:
• Motor NP Volts (41)
• Motor NP FLA (42)