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10. Pressing the START key will start the drive accelerating to the target speed.
Setting P1-07=2 allows the VS1MXS to be controlled in a forward and reverse direction from the
keypad.
11. Operation is the same as when P1-07=1 for start, stop and changing speed.
12. Press the START key. The display changes to ..
13. Press the UP arrow to increase speed the drive will run forward, increasing speed until the UP
arrow is released. Acceleration is limited by the setting in P-10. The maximum speed is the speed
set in P1-06.
14. To reverse the direction of rotation of the motor, press the START key again.
6.8 Motor Auto tuning
The VS1MXS uses a sophisticated Voltage Vector Control Method as the factory default setting to
ensure best possible motor operation. This control method requires the VS1MXS to carry out an
auto tune to measure certain motor parameters prior to operation, to ensure this function operates
correctly, and reduce the risk of nuisance tripping.
While the auto tune procedure does not drive or spin the motor, the motor shaft may still turn. It is not
normally necessary to uncouple the load from the motor; however the user should ensure that no risk
arises from the possible movement of the motor shaft.
6.8.1 Auto tune after Factory Reset or from Factory Set Parameters
Following a factory reset (See section 5.4), the correct data from the motor nameplate should
be entered in P1-01 (Motor Rated Voltage), P1-02 (Motor Rated Current) and P1-03 (Motor
Rated Frequency). Providing that P1-02 is adjusted from the factory default setting, the drive will
automatically carry out an auto tune on the motor the first time it is enabled. During the auto tune, the
display will show Auto-t. The test procedure may take several minutes to complete depending on the
motor. Once the auto tune is completed, the drive will operate as normal, and no further auto tuning
will be required unless the motor or drive control mode is changed (P4-01).
6.8.2 User Selected Auto tune
The user can program the drive to carry out an auto tune if required, as follows:
Ensure the motor nameplate values are correctly entered as described above.
Set P1-14 = 101 to allow access to Parameter Groups 2, 3 and 4.
Set P4-02 = 1 and press the button.
The auto tune will begin immediately when P4-02 is set to 1, and no external enable signal is
required. During the auto tune procedure, the motor shaft may turn. It is not normally necessary
to uncouple the load from the motor; however the user should ensure that no risk arises from the
possible movement of the motor shaft.
6.9 Operating in Sensorless Vector Speed Control Mode
The VS1MXS can be programmed by the user to operate in Sensorless Vector mode, which provides
enhanced low speed torque, optimum motor speed regulation regardless of load and accurate
control of the motor torque. In most applications, the default Voltage Vector control mode will provide
adequate performance, however if Sensorless Vector operation is required, the following procedure
should be followed:
Ensure the motor nameplate values are correctly entered in P1-01 (Motor Rated Voltage), P1-02
(Motor Rated Current) and P1-03 (Motor Rated Frequency)
Set P1-14 = 101 to allow access to parameter groups 2, 3 and 4.
The Motor Rated Power Factor from the motor nameplate MUST be entered in P4-05. If this data is not
available, consult the motor manufacturer for guidance.
Set P4-01 = 0 to select Sensorless Vector Speed Control.
MN762S
Using the Keypad 6-5
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