gefran AGy-EV Series - Page 144

144 • Chapter 7 - Parameters Description AGy-EV Instruction manual
F. 272
F. 271
Freq Reference In
F. 270
F. 270
F. 27
0
F. 270
Freq Reference Out
F. 270
F. 271, F272
Figure 7.5.7: Jump Frequencies
When the frequency reference is set to a value within the forbidden band, the frequency output assumes the
following behavior.
Example:
A) Increasing the reference from values lower than F.271
F.271 = 30Hz (first forbidden frequency threshold)
F.270 = 1Hz (forbidden band: 29Hz….31Hz)
Setting of frequency reference = 29,5Hz
Frequency output = 29Hz
Setting of frequency reference = 30,5Hz
Frequency output = 29Hz
B) Decreasing the reference from values higher than F.271
F.271 = 30Hz (first forbidden frequency threshold)
F.270 = 1Hz (tolerance band: 29Hz….31Hz)
Setting of frequency reference = 30,5Hz
Frequency output = 31Hz
Setting of frequency reference = 29,5Hz
Frequency output = 31Hz
The user can set any frequency reference, but if its value is within the forbidden range, the inverter will
maintain automatically the speed out of the limit of the tolerance band.
During the ramp execution the forbidden frequencies have no influence, so the output frequency will be linearly
generated.
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
F.270 Jump amplitude 0 0 100 Hz 0.1 339
F.271 Jump frequency 1 0 0 500 Hz 0.1 340
F.272 Jump frequency 2 0 0 500 Hz 0.1 341