HVAC400X – APPLICATION MANUAL
103
EN2B-0417GE51 R0719
RESETTING THE POTENTIOMETER
Selection number Selection name
Description
0
No reset
The last motor potentiometer frequency reference is kept through the
stop state and kept in memory if a power-down occurs.
1
Stop state
The motor potentiometer frequency reference is set to 0 when the
drive goes to the stop state, or when the drive is powered down.
2
Powered down
The motor potentiometer frequency reference is set to 0 only when a
power-down occurs.
P3.3.22 REVERSE DIRECTION (ID 15530)
You can use this parameter to permit running in reverse direction.
10.4
Ramps and Brakes Set-Up
P3.4.1 FORME DE LA RAMPE 1 (ID 500)
You can use this parameter to make the start and the end of the acceleration and deceleration ramps smoother.
Using the parameter
Ramp 1 Shape
, you can smooth the start and the end of the acceleration and deceleration
ramps. If you set the value to
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 0.1 and 10 s, you get an S-shaped acceleration or deceleration ramp. You can
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 P3.4.2 (Acceleration Time 1) and P3.4.3 (Deceleration Time 1).
Fig. 18. The acceleration/deceleration curve (S-shaped)
P3.4.2 ACCELERATION TIME 1 (ID 103)
You can use this parameter to set the time that is necessary for the output frequency to increase from zero
frequency to maximum frequency.
t
ID500
ID500
ID103, ID104
Hz
