Parameter description vacon • 40
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3
P3.23 PANEL POTENTIOMETER MIN CORRECTION
P3.24 PANEL POTENTIOMETER MAX CORRECTION
Define the minimum and maximum correction on preset reference, controlled with potentiom-
eter on panel.
3.4 Ramps
P4.1 ACCELERATION 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.
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