ADV200 • Functions description and parameters list 19
4 – DRIVE CONFIG
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
4.1 550 Save parameters BIT 0 0 1 RW FVS
Any changes to parameter values immediately affect drive operations, but are not automatically saved in the
permanent memory.
The “Save Parameters” command is used to save current parameter values in the permanent memory.
Any changes that are not saved will be lost when the drive is switched off.
To save parameters follow the procedure described in STEP 6 of the Startup wizard.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
4.2 552 Regulation mode ENUM V/f control 0 3 RWZ FVS
The ADV200 is capable of operating with different control modes:
0 V/f control
1 Flux vector OL
2 Flux vector CL
3 Autotune
The open loop V/f (V/f control) mode is the simplest type of asynchronous motor control, as the only param-
eters required are the rated voltage, current and frequency of the motor.
The open loop V/f control mode is factory-set and does not require any speed feedback. The natural varia-
tion in speed generated by machine load induction (slippage) can be compensated using Slip comp and Slip
comp lter.
In V/f mode a single drive can be used to control several asynchronous motors, even of different sizes, con-
nected in parallel, provided the sum of the currents of the single motors is less than the drive rated current.
If using several motors connected in parallel, be sure to provide adequate thermal protection for each single
motor.
Closed loop control is also possible in the V/f mode. It requires a speed reading by a digital encoder on the mo-
tor shaft; to enable encoder feedback, you must set parameter 2444 Slip comp mode =1. The optional EXP-
ENC card is necessary in order to acquire the encoder signals. The speed feedback supplied by the encoder
is used to compensate motor slippage in the different load conditions, to achieve accurate control and greater
precision of the actual motor speed.
With the sensorless vector control (Flux vector OL) mode, ne precision can be achieved at low motor rpm.
The drive has a algorithm that uses a self-tuning procedure to obtain all the electric measurements of the mo-
tor. This allows the speed and position of the motor shaft to be estimated, enabling operation similar to that of
a drive with feedback, both in terms of the response in torque to load variations, and of the regularity of rotation
even at low rmp.
In the eld oriented vector mode (Flux vector CL) an encoder is required for closed loop feedback. With this
mode it is possible to achieve extremely high dynamic responses thanks to the regulation bandwidth, maximum
torque even with the rotor blocked, speed and torque control. Numerous regulation parameters can be used to
adjust the drive to each specic application, for instance adaptive gains, system inertia compensation, etc..
Autotune mode enables self-tuning of motor parameters when the STARTUP WIZARD is not used. This com-
mand can only be executed after enabling the drive by opening the hardware contact between terminals 7 and
S3. Then set the Regulation mode parameter to Autotune. Next, if the drive is not already in Local mode,
press the Local key (the
LOC
) LED will light up) and re-close the hardware enabling contact (terminals 7 and
S3). Self-tuning can now be enabled (see parameters 2022 or 2224). When self-tuning is complete, open the
hardware contact between terminals 7 and S3 and restore any parameters that have been changed.
This procedure must be used for both self-tuning with the engine standing still and with the motor turning with
Flux vector CL mode. Motor parameter self-tuning is possible with Flux vector OL mode.
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