LSIS 6731001500, User Manual

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Learning Advanced Features
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)’.
Deceleration Valve Ramping Setting Details
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
Code Description
AP2-38 Dec Valve
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).