Operating Instructions ACTIVE 06/07176
176 Operating Instructions ACTIVE 06/07
clockwise
anticlockwise
generator
motor
motor generator
n
clockwise
anticlockwise
generator
motor
motor
generator
n
Operation mode 2
Current limit
728
Current limit generator op.
729
The properties of the speed controller can be adapted for adjustment and optimization
of the controller. The amplification and integral time of the speed controller are to be
set via parameters
Amplification 1 721 and Integral Time 1 722. For the second
speed range, parameters
Amplification 2 723, Integral Time 2 724 can be set. The
distinction between the speed ranges is done by the value selected via parameter
Speed Control Switch-Over Limit
738. The parameters Amplification 1 721 and In-
tegral time
1 722 are taken into account in the case of the default parameter Speed
Control Switch-Over Limit
738. If parameter Speed Control Switch-Over Limit 738
is set to a value higher than 0.00 Hz, parameters
Amplification 1 721, Integral Time
1
722 are active below the limit and parameters Amplification 2 723, Integral Time 2
724 are active above the limit.
The parameterized amplification at the current operating point can additionally be
assessed via the parameter
Backlash Damping 748 depending on the control devia-
tion. In particular the small signal behavior in applications with a gearbox can be im-
proved by a value higher than zero percent.
The parameter
Backlash damping 748 is available depending on the device type.
Parameter Settings
No. Description Min. Max. Fact. sett.
721 Amplification 1 0.00 200.00 -
1)
722 Integral Time 1 0 ms 60000 ms -
1)
723 Amplification 2 0.00 200.00 -
1)
724 Integral Time 2 0 ms 60000 ms -
1)
738 Speed Control Switch-Over Limit 0.00 Hz 999.99 Hz 55.00 Hz
748 Backlash Damping 0 % 300 % 100 %
1)
The default setting is relative to the recommended machine data for the amplifica-
tion and integral time. This enables a first function test in a large number of appli-
cations. The distinction of the parameter settings 1 or 2 for the current frequency
range is done by the software according to the selected limit value.
The optimization of the speed controller can be done with the help of a reference
value step-change. The amount of the step-change is defined by the set ramp or limi-
tation. The optimization of the PI controller should be done at the maximum admissi-
ble reference value change rate. First, the amplification is increased until the actual
value overshoots distinctly during the control process. This is indicated by a strong
oscillation of the speed and by the running noises. In the next step, reduce the ampli-
fication slightly (1/2 ...3/4 etc.). Then reduce the integral time (larger I component)
until the actual value overshoots only slightly in the control process.
If necessary, check the speed control settings in the case of dynamic operations (ac-
celeration, deceleration). The frequency at which a switch-over of the controller pa-
rameters is effected can be set via parameter
Speed Control Switch-Over Limit 738.
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