142 Program features
Critical speeds
Critical speeds function is available for applications where it is necessary to avoid
certain motor speeds or speed bands because of, eg, mechanical resonance
problems. The user can define three critical speeds or speed bands.
Settings
Parameter group
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
• torque control is active, or
• PID reference is being followed, or
• drive is in local control mode.
This function operates on a 2 ms time level.
Settings
Parameter
Additional information
Group
Constant speed settings
Constant speed 6. Used also for jogging function. See
section
on page
Constant speed 7. Used also for fault functions (see group
) and for jogging function (see
section
on page
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...