![ABB ACS320 series User Manual Download Page 115](http://html.mh-extra.com/html/abb/acs320-series/acs320-series_user-manual_2965115.webp)
Program features 115
Critical speeds
A Critical Speeds function is available for applications where it is necessary to avoid
certain motor speeds (drive output frequencies) or speed bands (output frequency
bands) because of, for example, mechanical resonance problems. The user can
define three critical frequencies or frequency bands.
Settings
Constant speeds
It is possible to define seven positive constant speeds. Constant speeds are selected
with digital inputs. Constant speed activation overrides the external speed reference.
Constant speed selections are ignored if
• PID reference is being followed, or
• drive is in local control mode.
This function operates on a 2 ms time level.
Settings
Constant speed 7 (
) is also used for fault functions. See
parameter group
Summary of Contents for ACS320 series
Page 1: ...ABB drives User s manual ACS320 drives 0 5 to 30 hp ...
Page 4: ......
Page 18: ...18 Safety ...
Page 28: ...28 Operation principle and hardware description ...
Page 56: ...56 Electrical installation ...
Page 142: ...142 Program features Connection diagram example ACS320 xx xxxx x ...
Page 282: ...282 Actual signals and parameters ...
Page 358: ...358 Fieldbus control ...
Page 376: ...376 Fault tracing ...
Page 382: ...382 Maintenance and hardware diagnostics ...
Page 407: ...Dimension drawings 407 Frame size R2 NEMA 1 Frame size R2 IP20 NEMA 1 3AUA0000051097 A ...
Page 409: ...Dimension drawings 409 Frame size R3 NEMA 1 Frame size R3 IP20 NEMA 1 3AUA0000051118 A ...
Page 411: ...Dimension drawings 411 Frame size R4 NEMA 1 Frame size R4 IP20 NEMA 1 3AUA0000051133 A ...
Page 412: ...412 Dimension drawings ...
Page 413: ...Index Numerics A B C D E F G H I K L M N O P R S T ...