Programming Your Application 1-17
690+ Series Frequency Inverter
AUTOTUNE
Designed for SENSORLESS VEC and
CLOSED-LOOP VEC Motor Control
Modes.
The auto-tune is an automatic test sequence
performed by the inverter to identify motor
model parameters. The motor model is used by the Sensorless Vector and Closed-Loop Vector
control modes. You MUST perform an auto-tune before operating the inverter in either of the
Vector control modes.
Refer to the Installation Product Manual, Chapter 4: “Operating the Inverter” - Set-up using the
Sensorless Vector Fluxing Mode.
Functional Description
The autotune sequence identifies the following motor parameters:-
• Per-phase stator resistance (STATOR RES)
• Per-phase leakage inductance (LEAKAGE INDUC)
• Per-phase mutual inductance (MUTUAL INDUC)
• Rotor time constant (ROTOR TIME CONST)
• No-load magnetising line current (MAG CURRENT)
• The encoder direction (ENCODER INVERT)
The Rotating autotune sequence rotates the motor up to the user-programmed MAX SPEED
(SETPOINT SCALE function block) in order to identify these parameters.
The Stationary autotune sequence does not rotate the motor and requires the correct value of
Magnetising Current to be entered.
The values of the above are stored in the MOTOR DATA function block. Autotune will
overwrite any previous entry made for these parameters.
Autotune can only be initiated from the “stopped” condition. When the test is complete, the
stack is disabled and ENABLE is set to FALSE.
MMI Menu Map
1
SETUP
2
MOTOR CONTROL
3
UTOTUNE
ENABLE
MODE
TEST DISABLE
ACTIVE
Autotune Sequence
–
ACTIVE [604]
–
FALSE
FALSE
–
[603] ENABLE
–
ROTATING
–
[689] MODE
–
0
–
[1025] TEST DISABLE
–
Parameter Descriptions
ENABLE
Range: FALSE / TRUE
Determines whether the Autotune sequence is operational or not. The Autotune sequence is
operational when set to TRUE and the drive is run. Refer to the Installation Product Manual,
Chapter 4: “Operating the Inverter” - The Autotune Feature.
MODE
Range: Enumerated - see below
Selects the Autotune operating mode. Refer to the Installation Product Manual, Chapter 4:
“Operating the Inverter” – The Autotune Feature.
Enumerated Value : Mode
0 : STATIONARY
1 : ROTATING
TEST DISABLE
Range: 0 to 4
This parameter expands on the MMI to show four tests. Each test can be individually disabled
by setting to TRUE.
Enumerated Value : Mode
0 : STATOR RES
1 : LEAKAGE IND
2 : ENCODER DIR
3 : MAG CURRENT
4 : ROTOR TIME CONST
ACTIVE
Range: FALSE / TRUE
This indicates the current state of the Autotune sequence. The Autotune sequence is
operational when displaying TRUE.
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