YASKAWA A1000 HHP Programming Manual page 137

Main Power Supply
0 V
KEB Digital Input
DC bus voltage
0 V
Output Frequency
KEB deceleration is
triggered by DC bus voltage
0 Hz
KEB Ride-Thru Operation as Long as CPU Has Power, KEB Input Not Used
Here, L2-01 = 4 and the input terminals have not been set for KEB Ride-Thru (H1-oo does not equal 65, 66). After
decelerating for the time set to parameter L2-10, the drive checks the DC bus voltage level. Deceleration continues if the DC
bus voltage is lower than the level set in L2-11. Normal operation resumes when the DC bus voltage rises above the value of
L2-11.
Power Loss Shorter than L2-10
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). 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 above the value of L2-11 and the terminal that initiated KEB Rid-Thru is released.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Power loss shorter than L2-02
Power Loss
L2-10
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
KEB restart after
L2-02
L2-02 has passed
(Power Loss
Ride-Thru Time)
Figure 1.92 KEB Operation Using L2-02 and KEB Input
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 1.93 KEB Operation Using L2-10, Without KEB Input
1.8 L: Protection Functions
Power loss longer than L2-02
Power Loss
0 V
L2-10
0 V
L2-02
(Power Loss
Ride-Thru Time)
KEB deceleration is
triggered by DC bus voltage
0 Hz
Power Loss Longer than L2-10
Power Loss
0 V
0 V
L2-10
(Min. KEB
Op. Time)
KEB Deceleration
0 Hz
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
KEB restart triggered by
digital input release
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
Acceleration using L2-07 or
C1-01/03/05/07 if L2-07 = 0
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