BENSHAW RSi H2 Series - AP2-38 Decelerating Valve Ramping

Application Groups
263
890053-00-02
8.1.4 AP2-38 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 ramping
time
DecValve
Time
0.0
0–6000.0
Sec
ADV
24
Frequency limit options
Limit Mode
0: No
0
No
-
1
Yes
25
Low Freq minimum
value
Freq Limit Lo
30.00
Start Freq– Max
Freq
Hz
26
Low Freq maximum
value
Freq Limit Hi
60.00
Freq Limit Lo– Max
Freq
Hz
Deceleration Valve Ramping Setting Details
Code
Description
AP2-38
DecValve Freq
Sets the start frequency where the slow deceleration begins in order to prevent
pump damage when the inverter stops. Decelerating valve ramping is
performed from the frequency set at AP2-38 to the frequency limit set at ADV-25
(low frequency limit for pump operation).
AP2-39
DecValve Time
Sets the time it takes to decelerate from the frequency set at AP2-38 to the
frequency limit set at ADV-25 (low frequency limit for pump operation).
The time set at AP2-39 refers to the absolute time that it takes for the pump to decelerate from the frequency
set at AP2-38 to the frequency limit set at ADV-25.