LSIS LSLV0055H100-4COFN - Decelerating Valve Ramping

201
Learning Advanced Features
Code
Description
when the inverter starts (it is different from DRV-03 acceleration gradient).
AP2-42 End
Ramp Dec
Refers to the time it takes to reach the 0 step (stop) from the minimum
pump operation frequency for a Start & End Ramp operation (Freq Limit
Lo) set at ADV-25 (it is different from DRV-03 deceleration gradient).
< Start&End Ramp Adjustment>
In the figure above, AP2-41 defines the acceleration time to the minimum operation
frequency ADV-25 (Freq Limt Lo). AP2-42 defines the deceleration time from the minimum
operation frequency to a stopped state. Time A (normal acceleration time set at DRV-03)
and Time B (normal deceleration time set at DRV-04) in the figure will change according to
the Acc/Dec gradients defined by AP2-41 and AP2-42.
5.16 Decelerating Valve Ramping
This function is used to prevent pump damage due to abrupt deceleration. When the pump
operation frequency reaches the valve ramp frequency (AP2-38 Dec Valve Freq) while
decelerating rapidly based on the deceleration ramp time (set at AP2-42), it begins to slow
down the deceleration based on the deceleration valve ramp time (set at AP2-39 DecValve
Time). Decelerating valve ramp operates when ADV-24 (Freq Limit) is set to ‗1 (Yes)‘.
Group
Code
Name
LCD Display
Parameter
Setting
Setting Range
Unit
AP2
38
Dec valve
ramping start
frequency
Dec Valve
Freq
40.00
Low Freq–
High Freq
Hz
39
Dec valve
DecValve
0.0
0–6000.0
Sec