
© 1998–2003 Schneider Electric All Rights Reserved
VVDED397047USR6/03 Chapter 2—Menus
06/2003 3—Drive Menu
45
Auto Tuning tUn
Initiates an autotune when the
tUn parameter is set to Yes.
No - Yes No
After the autotune is complete, the display will show
“done”. No is displayed if the autotune was not successful
or completed.
No is also displayed if the motor rating is less than 25% of
drive controller I
n
rating or if multiple motors are connected.
The CoS parameter may need to be manually adjusted for
optimum performance.
This feature will not work if any logic inputs are activated. If
freewheel stop or fast stop are assigned to a logic input,
they must be in the high state to autotune.
When initiated, the drive controller pulses the connected
motor, measures, and stores specific motor stator
resistance and resistance of the conductors. This allows
the drive controller to provide better current regulation for
better motor torque performance. This can be initiated from
the keypad display or by a logic input assigned to this
function.
Max.Freq. - Hz tFr
Maximum output frequency. The
maximum value is a function of
the switching frequency (SFr,
see page 50).
10 to 500 Hz
60/72 Hz
[1]
Table 11: 3—Drive Menu Parameters (continued)
Parameter Code Description
Adjustment
Range
Factory
Setting
[1]
Depending on the position of the 50/60 Hz switch. Ensure that the switch setting
matches the input frequency (see page 14).
[2]
I
n
= drive controller constant torque output current rating shown on the drive controller
nameplate.
[3]
The factory setting depends on the macro-configuration used: No for Material
Handling, Yes for General Use and Variable torque.
[4]
This parameter is not available on 125–500 hp drive controllers.
[5]
Refer to the drive controller instruction bulletin, VVDED397048US, for duty cycle
ratings of the drive controllers.
★ These parameters are available only with the I/O extension card installed.
Menu
3
CAUTION
MACHINERY OVERSPEED
Some motors and/or loads may not be suited for operation above nameplate motor
speed and frequency. Consult the motor manufacturer before operating motor above
rated speed.
Failure to follow this instruction can result in injury or equipment damage.
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