234 Actual signals and parameters
2203 DECELER
TIME 1
Defines the deceleration time 1, ie, the time required for the
speed to change from the value defined by parameter
(in vector control) to zero. The control mode is
selected by parameter
• If the speed reference decreases slower than the set
deceleration rate, the motor speed will follow the
reference signal.
• If the reference changes faster than the set deceleration
rate, the motor speed will follow the deceleration rate.
• If the deceleration time is set too short, the drive will
automatically prolong the deceleration in order not to
exceed drive operating limits.
If a short deceleration time is needed for a high inertia
application, the drive should be equipped with a brake
resistor.
Actual deceleration time depends on parameter
setting.
5.0 s
0.0…1800.0 s
Time
1 = 0.1 s
2204 RAMP SHAPE
1
Selects the shape of the acceleration/deceleration ramp 1.
The function is deactivated during emergency stop and
jogging.
0.0 = LINEAR
0.1…1000.0 s
0.0: Linear ramp. Suitable for steady acceleration or
deceleration and for slow ramps.
0.1…1000.0 s: S-curve ramp. S-curve ramps are ideal for
conveyors carrying fragile loads, or other applications where
a smooth transition is required when changing from one
speed to another. The S-curve consists of symmetrical
curves at both ends of the ramp and a linear part in
between.
1 = 0.1 s
All parameters
No.
Name/Value
Description
Def/FbEq
= 0 s
S-curve ramp:
> 0 s
A rule of thumb:
A suitable relation between the ramp shape time and the
acceleration ramp time is 1/5.
t
Par.
Par.
Max
Speed
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 ...