Technical data

Drive functions
7.1 Servo control
Function Manual
144 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
2. First commissioning has not been carried out:
The following relevant motor data must be checked and, where necessary, corrected:
– r0313 Motor pole pair number, actual (or calculated)
– p0314 Motor pole pair number
– p0341 Motor moment of inertia
– p0342 Ratio between the total moment of inertia and that of the motor
– p0640 Current limit
– p1498[0...n] Load moment of inertia
– p1520[0...n] CO: Torque limit, upper/motoring
– p1521[0...n] CO: Torque limit, lower/regenerative
– p1530[0...n] Motor mode power limit
– p1531[0...n] Regenerative mode power limit
3. V/f control can now be commissioned.
– p1318 V/f control ramp-up/ramp-down time
– p1319 V/f control voltage at zero frequency
– p1326 V/f control programmable characteristic frequency 4
– p1327 V/f control programmable characteristic voltage 4
– p1338[0...n] V/f control mode resonance damping gain
– p1339[0...n] V/f control mode resonance damping filter time constant
– p1349[0...n] V/f control mode resonance damping maximum frequency
Note
With synchronous motors, V/f control mode is normally only stable at low speeds.
Higher speeds can induce vibrations.
Oscillation damping is activated on the basis of suitable default parameter values and
does not require further parameterization in most applications. If you become aware of
interference caused by a transient response, you have the option of gradually
increasing the value of p1338 and evaluating how this affects your system.
Note
The drive can be ramped up to the current limit (p0640) relatively quickly without the
need for extensive parameterization (when operating the drive with a variable moment
of inertia, for example).
Note the following: Only the ramp-function generator stops when the current limit
(p0640) is reached. This does not prevent the current from increasing even further. In
view of this, the parameters you set must respect a safety margin relative to the
current limits for the monitoring functions to prevent the drive from switching off (in the
event of an overcurrent fault, for example).