|
No.
(Hex.)
|
Name
|
Description
|
Default
(Range)
|
|
L2-06
(048A)
Expert
|
Kinetic Energy Backup Decel Time
|
    
Sets the deceleration time during KEB operation used to decrease the maximum output frequency to 0.
|
0.0 s
(0.0 - 6000.0 s)
|
Set L2-29 = 2 or 3 [Kinetic Energy Backup Method = System KEB Ride-Thru 1 or System KEB Ride-Thru 2] to enable this function. When L2-29 = 1, 2 , 3 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2, System KEB Ride-Thru 1, System KEB Ride-Thru 2] and you do KEB Auto-Tuning, the drive will automatically set this value.
Sets the deceleration time necessary to decelerate from the frequency reference to 0 Hz when the drive detects a momentary power loss. If a Uv1 [DC Bus Undervoltage] fault occurs during KEB operation, decrease the deceleration time. If an ov [Overvoltage] fault occurs, increase the deceleration time.
-
L2-06 = 0
The drive automatically decreases C1-09 [Fast Stop Time] to the base value to keep the DC bus voltage above the low voltage detection level. The drive ignores L2-02 [Momentary Power Loss Ride-Thru Time] in this condition.
-
L2-06 ≠ 0
As shown in Figure 1, the frequency reference decelerates to the KEB frequency level as specified by the deceleration rate set in L2-06 and then returns to the initial frequency reference as specified by C1-01 [Acceleration Time 1]. The drive uses the setting value of the KEB frequency rate as shown in the this formula to set the KEB frequency level:
KEB frequency level = Output frequency before power loss × (1 - (L2-02)/ (L2-06))
Figure 1. Kinetic Energy Backup Decel Time
