P3.3.6.5 JOGGING REFERENCE 2 (ID 1240)
With the parameters P3.3.6.4 and P3.3.6.5, you can set the frequency references for the
jogging function. The references are bi-directional. A reverse command does not have an
effect on the direction of the jogging references. The reference for the forward direction has
a positive value, and the reference for the reverse direction has a negative value. You can
activate the jogging function with digital input signals or from Fieldbus in bypass mode with
Control Word bits 10 and 11.
9.6 RAMPS AND BRAKES SETUP
P3.4.1.1 RAMP 1 SHAPE (ID 500)
P3.4.2.1 RAMP 2 SHAPE (ID 501)
With the parameters Ramp 1 Shape and Ramp 2 Shape, you can make smoother the start
and the end of the acceleration and deceleration ramps. If you set the value to 0.0%, you get
a linear ramp shape. The acceleration and deceleration act immediately to the changes in
the reference signal.
When you set the value between 1.0% and 100.0%, you get an S-shaped acceleration or
deceleration ramp. Use this function to reduce mechanical erosion of the parts and current
spikes when the reference changes. You can modify the acceleration time with parameters
P3.4.1.2 (Acceleration Time 1) and P3.4.1.3 (Deceleration Time 1).
[t]
[Hz]
ID103, ID104
ID500
ID500
Fig. 40: The acceleration/deceleration curve (S-shaped)
P3.4.5.1 FLUX BRAKING (ID 520)
As an alternative to DC braking, you can use flux braking. Flux braking increases the braking
capacity in conditions where additional brake resistors are not necessary.
PARAMETER DESCRIPTIONS VACON · 251
24-HOUR SUPPORT +358 (0)201 212 575 · EMAIL: VACON@VACON.COM
9
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