Parameter descriptions
7.9.5.3 Speed controller
720 Operation mode (speed controller)
The control of the torque-forming current components is done in the outer control loop by the speed
controller. Via parameter
Operation Mode 720, you can select the operation mode for the speed con-
troller. The operation mode defines the use of the parameterizable limits. These are referred to the
direction of rotation and the direction of the torque and depend on the selected configuration.
0 -
Speed controller off
The controller is deactivated or the torque-forming component is
zero.
1 -
Limits for
motor/generator op.
The limitation of the speed controller assigns the upper limit to the
motor operation of the drive. Independent of the direction of rota-
tion, the same limit is used. The same applies in the case of regener-
ative operation with the lower limit. Factory setting.
2 -
Limits
pos./neg. torque
The assignment of the limit is done by the sign of the value to be
limited. Independent of the motor or generator operating points of
the drive, the positive limitation is done by the upper limit. The lower
limit is regarded as a negative limitation.
721 Amplification 1 (|f|<P738)
722 Integral Time 1 (|f|<P738)
723 Amplification 2 (|f|>P738)
724 Integral Time 2 (|f|>P738)
738 Speed Control Switch-Over Limit
748 Backlash Damping
The properties of the speed controller can be adapted for adjustment and optimization of the control-
ler.
The amplification and integral time of the speed controller can be set via parameters
Amplification 1
(|f|<P738)
721 and Integral Time 1 (|f|<P738) 722. For the second speed range, parameters Ampli-
fication 2 (|f|>P738)
723, Integral Time 2 (|f|>P738) 724 can be set. The distinction between the
speed ranges is done by the value set with parameter
Speed Control Switch-Over Limit 738. Parame-
ters
Amplification 1 (|f|<P738) 721 and Integral Time 1 (|f|<P738) 722 are considered with the
default parameter
Speed Control Switch-Over Limit 738. If parameter Speed Control Switch-Over
Limit
738 is set to a value greater than 0.00 Hz, parameters Amplification 1 (|f|<P738) 721, Integral
Time 1(|f|<P738)
722 will be active below this limit, and parameters Amplification 2 (|f|>P738) 723,
Integral Time 2 (|f|>P738) 724 will be active above this limit.
The parameterized amplification at the current operating point can additionally be assessed via the
parameter
Backlash Damping 748 depending on the control deviation. In particular the small signal
behavior in applications with a gearbox can be improved by a value higher than zero percent.
clockwise
anticlockwise
generator
motor
n
clockwise
M M
anticlockwise
motor
motor
n
Operation mode 2
Current limit 728
Current limit generator op. 729
generator
motor
generator
generator
233
Control functions 06/2013 Operating Instructions
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