Parameter descriptions
NOTE
The setting of Parameter Set Password 27 only does not lock the control facilities of the
keypad. Start, Stop, Change direction of rotation, Poti F and Poti P are still available.
7.5.1.1 Limits
418 Minimum Frequency
419 Maximum Frequency
The area of the output frequency of the frequency inverter and thus the speed setting range are de-
fined by the parameters
Minimum Frequency 418 and Maximum Frequency 419. The corresponding
control methods use the two limit values for scaling and calculating the frequency.
The parameters
Minimum Frequency 418 and Maximum Frequency 419 can only be changed while
the output stage is inhibited.
719 Slip Frequency
The torque-forming current component and thus the slip frequency of the 3-phase machine depend
on the required torque in the case of the field-orientated control methods. The field-orientated control
method also includes the parameter
Slip Frequency 719 to limit the torque in the calculation of the
machine model. The rated slip calculated from the rated motor parameters is limited in accordance
with the
Slip Frequency 719 which is parameterized as a percentage.
No. Description Min. Max. Fact. sett.
719 Slip Frequency 0% 10000% 330%
7.5.1.2 Positive and negative reference frequencies
493 Operation Mode (reference frequency source)
Via parameter
Operation Mode 493, you can define if the reference frequency value set via parame-
ters
Reference Frequency Source 1 475 and Reference Frequency Source 2 492 is to be either posi-
tive or negative only or if it can be both positive and negative. You can also output the reference fre-
quency as an inverted value (compared to the selected reference value source).
0 -
Off
The reference frequency channel is switched off. The reference
frequency is 0 Hz.
1 -
+/- reference value
The reference frequency can be both positive and negative. The
values of Reference frequency source 1 475 and Reference fre-
quency source 2 492 are added up. Factory setting.
2 -
Positive only
The reference frequency can only be positive. The reference fre-
quency is limited to the range from 0 Hz to the Maximum frequen-
cy
419. The values of Reference frequency source 1 475 and Ref-
erence frequency source 2
492 are added up, then the result is
limited to positive values.
3 -
Inverted
The reference frequency is inverted (compared to the sign of the
selected reference value source). The values of Reference frequen-
cy source 1
475 and Reference frequency source 2 492 are added
up, then the result is inverted.
145
Reference Values 06/2013 Operating Instructions
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