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6. COMMAND REFERENCE 151
MOTOR
Motor Settings
Syntax aMOTOR(Type,Current,Resolution,Max_vel,%thirdharmonic,Resistance,
Inductance)
Description
This command describes the characteristics of the motor being used to the
rest of the drive. The parameters used are:
Type – 0 to 1023 number code
Current – RMS continuous motor current (0.1 to 5.6 A in 0.1 A increments
for ViX500).
Resolution – Any value from 200 to 51200 steps per rev.
Max_vel 1 to 3,000 rpm
Third Harmonic – % of third harmonic applied to current sine wave. Used to
increase slow speed smoothness. Range: +/-15%.
Resistance – Winding resistance in Ohms*
Inductance – Winding inductance in mH*
*Measured line-to-line across the motor terminals.
The command sets all of the motor parameters and then calculates the
optimum settings for the digital torque amplifier.
If there is no HV present when the motor command is issued, the HV is
assumed to be 80V, and this figure is used for the calculation of the digital
torque amplifier optimum settings. When operating the drive at a voltage
other than 80V DC, make sure the HV is present when issuing the motor
command. Otherwise, the settings of the digital torque amplifier will not be
optimised.
IT IS IMPORTANT TO RE-ISSUE THE MOTOR COMMAND IF YOU
CHANGE THE HV.
ANY CHANGES TO THE MOTOR TYPE MUST BE FOLLOWED BY A
SAVE (SV) AND RESET (Z) OR CYCLING POWER TO THE DRIVE.
The motor type is stored as 10 binary digits, as follows:
bits 0 to 7 motor identification code
bit 8 temperature sensor fitted
bit 9 parallel or series connection ‘1’ = series, ‘0’ = parallel