When the inverter is restarted upon power shutdown, the displayed parameters are the
parameters selected before the power shutdown.
4.6 Password Setting
The inverter provides user password protection function. When FP-00 is set to non-zero value,
it indicates the user password, and the password protection turns valid after exiting the function
code editing status. When pressing PRG key again, “------“ will be displayed, and common
menu cannot be entered until user password is input correctly.
To cancel the password protection function, enter with password and set FP-00 to “0”.
The user password protection for the parameter items in the shortcut men depends on the
status of F7-03, and is inactive for the parameter values.
4.7 Automatic Tuning of Motor Parameters
To select the vector control running mode, it must input the nameplate parameter of the motor
accurately prior to the running of the inverter. The MD320 inverter will select standard motor
parameters matching the nameplate parameter. Since the vector control mode relies highly
on the motor parameters, it must acquire the accurate parameters of the controlled motor to
ensure the good control performance.
The procedures for the automatic tuning of motor parameters are described below:
First, select the command source (F0-02) as the command channel of the operation panel.
Second, input the following parameters in accordance with the actual motor parameters:
F1-01: Rated motor power
F1-02: Rated motor voltage
F1-03: Rated motor current
F1-04: Rated motor frequency
F1-05: Rated rotation speed of motor
If the motor is completely disconnected from the load, select “2” (complete tuning) in F1.11,
and press RUN key on the keyboard panel, then the inverter will automatically calculate the
following parameters:
F1-06: Rotor resistance
F1-07: rotor resistance
F1-08:Leakage inductive reactance F1-09: mutual inductive reactance
F1-10: No-load excitation current
Finally, complete the automatic tuning of motor parameters.
If the motor cannot be completely disconnected with the load, select “1” for F1-11 (static
tuning), and then press RUN key on the keyboard panel.
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