|
No.
(Hex.)
|
Name
|
Description
|
Default
(Range)
|
|
L3-25
(046F)
Expert
|
Load Inertia Ratio
|
        
Sets the ratio between motor inertia and machine inertia.
|
1.0
(0.1 - 1000.0)
|
Set one of these parameters to enable L3-20:
-
L2-29 = 1 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2]
-
L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Decel Ramp)]
-
L3-11 = 1 [Overvoltage Suppression Select = Enabled]
-
H1-xx = 7A or 7B [MFDI Function Selection = KEB Ride-Thru 2 Activate (N.O./N.C.)]
Note:
-
If you set this value incorrectly when L2-29 = 1, H1-xx = 7A or 7B, or L3-11 = 1, it can cause large current ripples and ov [Overvoltage], Uv1 [DC Bus Undervoltage], or oC [Overcurrent] faults.
-
KEB Tuning will automatically set this value.
Automatically Adjust Parameters
Do Inertia Tuning when A1-02 = 3 or 7 [Control Method Selection = Closed Loop Vector or PM Closed Loop Vector]. The drive automatically adjusts parameters.
Manually Adjust Parameters
Use this formula to find the load inertia ratio:
