Vacon 20 SERIES, Applications Manual

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Parameter description vacon • 40
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3
P3.23 P
ANEL
P
OTENTIOMETER MIN CORRECTION
P3.24 P
ANEL
P
OTENTIOMETER MAX CORRECTION
Define the minimum and maximum correction on preset reference, controlled with potentiom-
eter on panel.
3.4 Ramps
P4.1 A
CCELERATION TIME
1
Ramp time, referred to variation from zero frequency to max frequency.
P4.2 D
ECELERATION TIME
1
Ramp time, referred to variation from max frequency to zero.
P4.3 R
AMP
1 S
SHAPE
When value is greater than zero, acceleration and deceleration ramps have a S shape.
The parameter is the time needed to reach full acc/dec.
When value is greater than zero, acceleration and deceleration ramps have a S shape. The pa-
rameter is the time needed to reach full acc/dec.
The start and end of acceleration and deceleration ramps can be smoothed with this parame-
ter. Setting value 0 gives a linear ramp shape which causes acceleration and deceleration to
act immediately to the changes in the reference signal.
Setting value 0.1…10 seconds for this parameter produces an S-shaped acceleration/deceler-
ation. The acceleration time is determined with parameters P1.3 and P1.4.
Figure 5. Acceleration/deceleration (S-shaped).
These parameters are used to reduce mechanical erosion and current spikes when the refer-
ence is changed.
P4.1, P4.2
[Hz]
[t]
P4.3
P4.3