YASKAWA AC Drive-A1000 Technical Manual page 246

5.8 L: Protection Functions
Main Power Supply
0 V
DC Bus Voltage
0 V
Output Frequency
KEB Deceleration
0 Hz
KEB Ride-Thru Operation as Long as CPU Has Power, KEB Input Used
Here, L2-01 = 3 and an input terminal is set to issue KEB Ride-Thru (H1-oo = 65, 66, 7A, 7B). After decelerating for the
time set to parameter L2-10, the drive checks the DC bus voltage and the status of the digital input. Deceleration continues if
the DC bus voltage is still below the level set in L2-11 or if the digital input assigned to KEB Ride-Thru is still active. Normal
operation resumes when the DC bus voltage rises about the value of L2-11 and the terminal that initiated KEB Rid-Thru is
released.
Main Power Supply
0 V
KEB Digital Input
DC bus voltage
0 V
Output Frequency
0 Hz
L2-01 = 5
KEB operation ends when the motor has come to a stop, even if the power returns and the digital input terminal that initiated
KEB Ride-Thru is cleared.
246
Power Loss Shorter than L2-10
Power Loss
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
L2-10
(Min. KEB Operation
Acceleration using L2-07 or
Time)
C1-01/03/05/07 if L2-07 = 0
Figure 5.93 KEB Operation Using L2-10, Without KEB Input
Power loss shorter than L2-10
Power Loss
L2-11 (Desired DC Bus Voltage)
L2-10 (Minimum KEB
Operation Time)
KEB deceleration is
triggered by DC bus voltage
Figure 5.94 KEB Operation Using L2-10 and KEB Input
0 V
0 V
KEB Deceleration
0 Hz
0 V
L2-05 (Uv Detection Level)
0 V
KEB restart after
L2-02 has passed
KEB deceleration is
triggered by DC bus voltage
0 Hz
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Power Loss Longer than L2-10
Power Loss
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
L2-10
(Min. KEB
Acceleration using L2-07 or
Op. Time)
C1-01/03/05/07 if L2-07 = 0
Power loss longer than L2-10
Power Loss
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
L2-10 (Min.
KEB
KEB restart after
Operation
L2-02 has passed
Time)