MotorRatedFrequency (05.006) and MotorRatedVoltage (05.009) define the frequency to voltage characteristic applied to the motor. See Open-
loopVoltageMode (05.014) for more details.
Parameter 05.010 Motor Rated Power Factor
Short description
Set to the rated power factor of the motor. This value can be measured by the drive during a rotating
autotune
Mode Open‑loop
Minimum 0.00 Maximum 1.00
Default 0.85 Units
Type 16 Bit User Save Update Rate Background read/write
Display Format Standard Decimal Places 2
Coding RW, RA
MotorRatedPowerFactor (05.010) is the true power factor of the motor under rated conditions, i.e. the cosine of the angle between the motor voltage and
current. If StatorInductance (05.025) is set to a non-zero value then the stator inductance is used to calculate the rated magnetising current for the motor and
the rated power factor can be calculated by the drive. Therefore if StatorInductance (05.025) is non-zero MotorRatedPowerFactor (05.010) is continuously
set to the calculated value of rated power factor by the drive. If StatorInductance (05.025) is set to zero then MotorRatedPowerFactor (05.010) is used to
estimate the rated magnetising current which is an approximation and not as accurate. StatorInductance (05.025) can be measured by the drive during auto-
tuning and this is the preferred option, however, if it is not possible to obtain the value for StatorInductance (05.025) then MotorRatedPowerFactor (05.010)
should be set to the motor nameplate value.
Parameter 05.011 Number Of Motor Poles
Short description Set to the number of poles of the motor
Mode Open‑loop
Minimum 0 Maximum 16
Default 0 Units Pole pairs
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, BU
If NumberOfMotorPoles (05.011) = 0 the number of motor poles are calculated automatically as given below.
Pole pairs = 60 x MotorRatedFrequency (05.006) / MotorRatedSpeed (05.008) rounded down to the nearest integer.
If NumberOfMotorPoles (05.011) > 0 the value is taken as the number of pole pairs.
When viewed with a keypad, the value of 0 is displayed as Automatic and any non 0 value is displayed is the twice the parameter value representing number
of motor poles rather than pole pairs.
Parameter 05.012 Auto-tune
Short description Defines the auto-tune test to be performed
Mode Open‑loop
Minimum 0 Maximum 2
Default 0 Units
Type 8 Bit Volatile Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, NC
The following describes how an auto-tune test can be initiated and normal operation can be resumed after the test:
1. An auto-tune test cannot be initiated if the drive is tripped or the drive inverter is active, i.e. DriveHealthy (10.001) = 0 or DriveActive (10.002) = 1.
The inverter can be made inactive by ensuring that the Final drive enable is inactive (see Menu 06), or the Final drive run (see Menu 06) is inactive
and HoldZeroFrequency (06.008) = 0.
2. An auto-tune test is initiated by setting Auto-tune (05.012) to a non-zero value and making the Final drive enable and the Final drive run active.
3. All tests that move the motor will move the motor in the forward direction if ReverseSelect (01.012) = 0 or the reverse direction if ReverseSelect
(01.012) = 1.
4. If the auto-tune sequence is completed successfully the Final drive enable is set to the inactive state and Auto-tune (05.012) is set to zero. The Final
drive enable can only be set to the active state again by removing the enable and reapplying it. The enable can be removed by setting DriveEnable
(06.015) = 0, or by setting bit 0 of the ControlWord (06.042) to 0 provided ControlWordEnable (06.043) = 1, or by making HardwareEnable = 0.
5. If a trip occurs during the auto-tune sequence the drive will go into the trip state and Auto-tune (05.012) is set to zero. As in 4. above, the enable must
be removed and re-applied before the drive can be restarted after the trip has been reset. However, care should be taken because if the auto-tune
was not completed the drive parameters that should have been measured and set up will still have their original values.
The following describes the effects of the auto-tune test on the drive :
1. All auto-tune tests rely on the motor being stationary when the test is initiated to give accurate results.
2. If SelectMotor2Parameters (11.045) = 0 then the parameters associated with motor map 1 are updated as a result of the test, and if
SelectMotor2Parameters (11.045) = 1 the parameters associated with motor map 2 are updated.
3. Only when the whole test is completed, are the results written to the appropriate parameters and these parameters saved in the drive non-volatile
memory. If ParameterCloning (11.042) is set to 3 or 4 the parameters are also written to a non-volatile media card fitted on the drive.
The table below shows the parameters required for motor control indicating which should be set by the user and which can be measured with an auto-tune
test.
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