ACS 300 User’s Manual
61
Chapter 7 - Drive Parameters
A. OUT OFFS
The analogue output signal minimum can be set to 0 mA or
4 mA. The maximum output remains 20 mA. Selecting 4 mA
provides a “living zero” function. If a fault occurs, the output
current will drop to 0 mA as an alternate fault indicator signal.
SWITCH f
Motor noise can be minimised by adjusting the switching
frequency to a value that does not create resonances in the
motor system. The optimum switching frequency is the lowest
frequency at which the noise is acceptable. This frequency may
not be the same for identical motor systems. As the switching
frequency goes up, the inverter efficiency goes down, so it is best
to use a low switching frequency if the application can tolerate
noise.
Note! At output frequencies less than 12 Hz, the switching
frequency may be automatically reduced.
CRIT f1L
(CRIT f1H)
(CRIT f2L)
(CRIT f2H)
In some systems it may be necessary to avoid certain
frequencies because of mechanical resonance problems. With
these parameters it is possible to set up two different frequency
ranges that the ACS 300 will skip over. It is not necessary that, for
example, CRIT f2L be greater than CRIT f1H, just as long as the
LOW parameter in one set is lower than the HIGH parameter in
the same set. Sets may overlap, but the skip will be from the
lower LOW value to the higher HIGH value.
Summary of Contents for ACS 300
Page 14: ...xiv ACS 300 User s Manual Table of Contents ...
Page 24: ...10 ACS 300 User s Manual Chapter 1 Overview of This Manual ...
Page 28: ...14 ACS 300 User s Manual Chapter 2 Mechanical Installation ...
Page 50: ...36 ACS 300 User s Manual Chapter 4 Control Connections ...
Page 60: ...46 ACS 300 User s Manual Chapter 6 Control and Parameter Logic ...
