Programming Guide | VLT® AutomationDrive FC 360
Set the nominal back EMF for the motor when running at 1000 RPM. Back EMF is the voltage generated by a PM motor when no drive
is connected and the shaft is turned externally. Back EMF is normally specified for nominal motor speed or for 1000 RPM measured
between 2 lines. If the value is not available for a motor speed of 1000 RPM, calculate the correct value as follows: If back EMF is, for
example, 320 V at 1800 RPM, it can be calculated at 1000 RPM:
Example:
Back EMF 320 V at 1800 RPM. Back EMF = (Voltage/RPM)*1000 = (320/1800)*1000 = 178.
This parameter is only active when parameter 1-10 Motor Construction is set to options that enable PM (permanent magnet) motors.
 NOTICE
When using PM motors, it is recommended to use brake resistors.
1-41 Motor Angle Offset
Default value: 0 Parameter type: Range (-32768–32767)
Setup: All setups Conversion index: 0
Data type: Int16 Change during operation: True
Enter the offset angle between PM motor and index position of the attached encoder.
When to find the offset angle: after the drive start-up, applying DC hold, and entering the value of parameter 16-20 Motor Angle.
This parameter is only active when parameter 1-10 Motor Construction is set to [1] PM motor.
1-42 Motor Cable Length
Default value: Size related Parameter type: Range (0–100 m)
Setup: All setups Conversion index: 0
Data type: Uint8 Change during operation: False
Set the motor cable length in meters.
1-43 Motor Cable Length Feet
Default value: Size related Parameter type: Range (0–328 ft)
Setup: All setups Conversion index: 0
Data type: Uint16 Change during operation: False
Set the motor cable length. The length unit is foot.
1-44 d-axis Inductance Sat. (LdSat)
Default value: Size related Parameter type: Range (0.001–65535.000 mH)
Setup: All setups Conversion index: -3
Data type: Int32 Change during operation: False
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