Dinverter
A
User Guide
Issue code: d2au9
81
Skip speeds
0.20
Skip speed 1
RW
Uni 0 ~ ULF
Hz
0
0.21
Skip-speed band 1
RW
Uni 0 ~ 5
Hz
0.5
0.22
Skip speed 2
RW
Uni 0 ~ ULF
Hz
0
0.23
Skip-speed
band 2
RW
Uni 0 ~ 5
Hz
0.5
If required, enter values in the skip-speed parameters to prevent the Drive
running the motor at speeds that cause unwanted vibration in the machine.
If vibration occurs over a band of speeds, skip-speed bands can be set up.
Two independent skip bands can be set up in Menu 0. Set these parameters
at the frequencies that correspond with the required motor speeds.
Set a skip-speed parameter at the centre frequency of the required band to
be skipped. Set the related skip-speed band parameter at the range of
frequencies to be skipped
each side
of the skip frequency. The total skip
band is twice the value of the skip-speed band parameter. When a skip-
speed parameter is set at zero, the skip band does not occur.
When the speed reference ascends into a skip band, the output frequency of
the Drive is held at the lower edge of the band. When the speed reference
has passed through the skip band, the output frequency rises under ramp
control to the value of the speed reference. The same principle applies
when the speed reference descends into a skip band.
Analog-input modes,
Keypad speed reference monitoring
0.24
Analog input 1
mode selector
RW
Txt ULt (0)
th (1)
Ult
(0)
Ensure
0.24
is set at
Ult
for signal voltage input.
(For use as a motor thermistor input, see the
Dinverter
A
Technical Reference
Manual
.)
