Installation manual
Motor Control Parameters
S1A53838 09/2011 67
Code Name / Description Factory setting
Pt [Mot cont. mode sel.]
Motor control mode 1
0
1
2
3
4
5
6
[Constant V/Hz]: Constant V/Hz
Use constant V/Hz mode for loads that require the same torque at low speeds as at rated speeds. Low speed torque can be ad-
justed manually by setting parameter [Motor Voltage Boost] (ub) (see page 68
).
[Variable Torque]: Variable torque
Use variable torque mode for loads such as centrifugal fans and pumps whose torque requirements increase as a square of the
increase in motor speed. Low speed torque can be adjusted manually by setting parameter ub.
[Cst V/Hz+Boost]: Constant V/Hz with automatic torque boost
See the diagram on page 66
.
This mode is similar to the constant V/Hz mode (for loads that require the same torque at low speeds as at rated speeds), except
it automatically increases motor voltage and torque to compensate for increases in load.
[SVC]: Sensorless vector control
See the diagram on page 66
.
Use sensorless vector control mode to increase torque at motor speeds below 3 Hz or to improve speed regulation (0.5 to 1%).
[Economy]: Energy saving
In energy savings mode, the ATV212 drive monitors motor loading and automatically modulates the voltage applied to the motor
to optimize energy consumption.
If the ATV212 drive and the connected motor have the same power rating, and if the motor has a nominal 1500 rpm rating, no
motor auto-tuning is required to use this motor control mode. Otherwise, follow the steps outlined in “Motor Tuning” on page 70
.
[Do not use]: Reserved
[Do not use]: Reserved
0
Motor rated voltage
Motor Voltage Boost
Motor Rated Frequency
Output Frequency (Hz)
Output Voltage (%)
0
Motor rated voltage
Motor Voltage Boost
Motor Rated Frequency
Output Frequency (Hz)
Output Voltage
(%)