Emheater EM12 Series, User Manual

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4. Operation and display EM12 User’s Manual
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When the frequency inverter is repowered on again after power failure, the parameters are recorded as before
power failure and displaying.
4.4 Password Setting
The frequency inverter provides the user password protection function. When A0-00 is set to a non-zero value, the
value is the user password. The password takes effect after you exit the function code editing state. When you
press "PRG" key, “------” will be displayed, and you must enter the correct user password to enter the menu.
To cancel the password protection function, enter with password and set A0-00 to 0.
4.5 Motor parameter auto-tuning
Select vector control running mode, before frequency inverter start to operate, you must accurately write in the
nameplate parameter of motor by keypad. EM12 frequency inverter will match standard motor parameter
according to the nameplate; the vector control mode strongly depended on motor’s parameters, if you want to get
good control performance, then you must let inverter to obtain the exact parameters of controlled motor.
The process of motor auto-tuning is as follows:
Firstly, select command source (b0-02) as keypad command channel. Then write in the actual motor parameters as
the following parameters (according to the nameplate of present motor):
Motor Parameter
Motor 1
(Motor 2)
b0-00: Motor Type Selection
d0-01(d3-01): Motor Rated Voltage
d0-03(d3-03): Motor Rated Frequency d0-00(d3-00): Motor Rated Power
d0-02(d3-02):Motor Rated Current
d0-04(d3-04): Motor Rated Speed
AC asynchronous motor tuning
If the motor can be disconnected from the load, then please set d0-30/d2-30 to 2(asynchronous motor complete
auto-tuning), then press the RUN key on the keypad. The frequency inverter will automatically calculate the
following parameters of motor:
Motor Parameter
Motor 1
(Motor 2)
d0-05(d3-05): Stator resistance (asynchronous motor)
d0-06(d3-06): Rotor resistance (asynchronous motor)
d0-07(d3-07): Leakage inductive reactance(asynchronous motor)
d0-08(d3-08): Mutual inductive reactance(asynchronous motor)
d0-09(d3-09): No-load current(asynchronous motor)
Finish motor parameter auto-tuning.
If the motor cannot be fully disconnected with the load, then please select d0-30/d2-30 as 1 (asynchronous static
auto-tuning), and press the "RUN" key in the keypad panel.
And the frequency inverter will automatically calculate the following parameters of motor:
Motor Parameter
Motor 1
(Motor 2)
d0-05(d3-05): Stator resistance (asynchronous motor)
d0-06(d3-06): Rotor resistance (asynchronous motor)
d0-07(d3-07): Leakage inductive reactance(asynchronous motor)
Description of synchronous motor identification:
As the EM12 driven synchronous machine system needs the feedback signal from encoder, so uses need to
correctly set the parameter of encoder before identification.
During the identification process of synchronous system, rotation movement is needed. The best identification
method is no-load dynamic running identification, if the condition is not allowed; with-load dynamic
identification is workable.