BENSHAW M2L 3000, User Manual

Page: 83 / 140

7 – Parameter Descriptions
83
AFN (Advanced Function) Group Parameters
AFN-00 (40139) Skip Frequency Enable Value: 0: Disabled
1: Enabled
Default: 0
AFN-01 (40140) Skip Frequency Low 1 Value: 0.00 – 300.00 Hz Default: 20.00
AFN-02 (40141) Skip Frequency High 1 Value: 0.00 – 300.00 Hz Default: 21.00
AFN-03 (40142) Skip Frequency Low 2 Value: 0.00 – 300.00 Hz Default: 30.00
AFN-04 (40143) Skip Frequency High 2 Value: 0.00 – 300.00 Hz Default: 31.00
AFN-05 (40144) Skip Frequency Low 3 Value: 0.00 – 300.00 Hz Default: 40.00
AFN-06 (40145) Skip Frequency High 3 Value: 0.00 – 300.00 Hz Default: 41.00
The Skip Frequency function locks out certain frequencies that can cause resonance in
the driven equipment. The drive will accelerate and decelerate through these frequen-
cies but will not remain at the locked out frequencies. Three different Skip Frequency
ranges can be programmed (AFN-01 through AFN-06).
AFN-07 (40146) Dwell Enable Value: 0: Disabled
1: Enabled
Default: 0
The Dwell Function enables the drive to ramp to the programmed Dwell Frequency
(AFN-08), and remain there for the programmed Dwell Time (AFN-09) before continu-
ing the programmed acceleration or deceleration ramp.
AFN-08 (40147) Dwell Frequency Value: 0.00 – 300.00 Hz Default: 0.00
When the Dwell function is enabled in AFN-07, this value determines the frequency at
which the drive will remain for the duration programmed in
Dwell Time (AFN-09).
AFN-09 (40148) Dwell Time Value: 0.01 – 600.00 Seconds Default: 0.01
When the Dwell function is enabled in AFN-07, this value determines the duration of
time that the drive will remain at the frequency programmed in
Dwell Frequency (AFN-
08).
AFN-10 (40164) Flying Start Current Level Value: 1 – 99 % Default: 25
When the Start Mode (FUNCTION-00) is set to “Flying Start”, a sequence is enabled to
“catch the motor on the fly”. This sequence can be defined in the following steps:

1 - Current Application : The drive applies a low level current to the motor

2 - Frequency Ramp : Beginning at the selected starting (AFN-14) fre-
quency, the drive ramps output frequency down until the speed of the motor
is matched

3 - Voltage Adjust : The drive sets the voltage to the appropriate level based
on the frequency determined in Step 2.
Once this sequence is complete, the drive then accelerates along the programmed ac-
celeration profile.
Flying Start Current Level defines the low level current output used to begin the Flying
Start sequence Step 1. While in Flying Start sequence Step 2, the output voltage is re-
duced as necessary to maintain current below the Flying Start Current Level.
AFN-11 (40165) Flying Start Current
Application Time Value: 0.01 – 10.00 Seconds Default: 5.00
Flying Start Current Application Time defines the length of time for Step 1 of the Flying
Start sequence. The drive applies the Flying Start Current Level (AFN-10) before con-
tinuing with the flying start sequence.