Vacon 20, Complete User'S Manual

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114
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vacon parameter descriptions
9
9.4 Ramps & brakes setup (Control panel: Menu PAR -> P4)
4.1 R
AMP
S-
SHAPE
The start and end of the acceleration and deceleration ramp can be smoothed
with this parameter. Setting value 0 gives a linear ramp shape which causes
acceleration and deceleration to act immediately to the changes in the refer-
ence signal.
Setting value 0.1…10 seconds for this parameter produces an S-shaped accel-
eration/deceleration. The acceleration and deceleration times are determined
with parameters 4.2 and 4.3.
P4.2, 4.3
[Hz]
[t]
P4.1
P4.1
Figure 9.9: S-shaped acceleration/deceleration
4.2 A
CCELERATION TIME
1 
4.3 D
ECELERATION TIME
1

4.4 R
AMP
S-
SHAPE
2 
4.5 A
CCELERATION TIME
2

4.6 D
ECELERATION TIME
2
These limits correspond to the time required for the output frequency to ac-
celerate from the zero frequency to the set maximum frequency, or to decel-
erate from the set maximum frequency to zero frequency.
The user can set two different acceleration/deceleration time and set two dif-
ferent ramp s-shape for one application.The active set can be selected with
the selected digital input (par. 5.11).