AGy-EV Instruction manual Chapter 7 - Parameters Description • 143
F.250 Ramp S-shape
The S-shaped ramp can be used to obtain a smooth behaviour of the system at the beginning and at the end of
the acceleration and deceleration.
The ramp time, intended as the time needed for accelerating from zero to the maximum frequency F.020, is
given by the sum of the linear ramp time in use and the S-shape time F.250.
F. 250
F. 250
F. 250 F. 250
f
t
ACC TIME DEC TIME
Figure 7.5.6: Ramp S-shape
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
F.250 Ramp S-shape 0 0 10 sec 0.1 337
F.260 Ramp extens src (Ramp extension source)
Any of the Analog Inputs can be used to extend the programmed ramp time
This extension will change linearly according to the value applied on the Analog Input.
The programmed ramp times are multiplied by a factor ranging from 1.0, when the Analog Input is less than
equal to 10%, to 10.0, when the Analog Input is 100%.
The parameter select the source from where this function is provided and controlled.
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
F.260 Ramp extens src [0] Null 0 0 3 338
[1] Analog inp 1 (setting through I.200…I.204)
[2] Analog inp 2 (setting through I.210…I.214)
[3] Analog inp 3 (setting through I.220…I.224)
Jump Frequencies
F.270 Jump amplitude
F.271 Jump frequency1
F.272 Jump frequency2
In a system composed by motor and drive, at certain frequencies values, it is possible to meet the generation of
noisy vibrations, caused by mechanical resonances.
Through the parameters F.271 and F.272, it is possible to specify two frequencies that are forbidden for inverter
operation.
The parameter F.270 defines the band of the forbidden zone.
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