2nd edition, 31-03-2020
7000.05061, 2nd edition, 31-03-2020
7000.05061
Description of functions
35
5.4.5
Controller parameters
The controller parameters are preset at the factory. They can be adapted for special applica-
tions.
The following requirements with respect to the control system can be identified:
Control rigidity
Uniformity of the speed within one revolution
Permitted control deviation
Permitted overshoot
Required stability reserves
The proportional component and the integral component of the PI speed controller can be
adjusted.
5.4.6
Start time (in sensorless mode only)
In sensorless mode, the motor starts via a synchronous drive. The time between switchover
from one commutation state (phase) to the next commutation state can be set to the con-
nected motor.
5.4.7
Minimum speed (in sensorless mode only)
Stable operation of the motor in sensorless mode is only possible from a certain speed. It is
therefore recommended to define a minimum set speed. This value is used even if other
parameters or speed set value specifications would result in a lower speed.
5.4.8
Delayed Current Error (only error output)
This parameter is only effective if the digital output has been set as a fault output (see
chap. 5.3, p. 31). Activation of the output may be delayed in this case. The output is not
activated until the time preset by DCE has expired, even if the current is already being lim-
ited. As a result, brief exceedance of the limit current can be ignored.
Parameter
Meaning
Maximum value
Unit
V
Proportional component
32767
Digit
VI
Proportional component multiplied by integral component
65 535
Digit
If parameter V is increased while parameter VI remains unchanged, the I-component of
the controller will decrease. If the I-component is to remain unchanged, parameter VI
must be multiplied by the same factor as parameter V.
Parameter
Meaning
Maximum value
Unit
Start time
Switchover time between the phases at start-up 2739
ms
Parameter
Meaning
Minimum value
Unit
Minimum speed (n
setMin
)
Minimum speed set value specification
1
rpm
Parameter
Meaning
Maximum value
Unit
Delayed Current Error (DCE) Delay in activation of the fault output
5100
ms
