YASKAWA A1000 HHP Programming Manual page 138

1.8 L: Protection Functions
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.
n
KEB Operation Wiring Example
Figure 1.95 shows a wiring example to trigger the KEB Ride-Thru at power loss using an undervoltage relay. When a power
loss occurs, the undervoltage relay triggers KEB Ride-Thru at terminal S6 (H1-06 = 65, 66). Note that using System KEB
Ride-Thru requires an additional dynamic braking option.
Note: Do not switch off the Run command during momentary power loss. If the Run command is shut off, the drive will not accelerate back to
speed when the power is restored.
n Parameters for KEB Ride-Thru
Table 1.42 lists parameters needed to set up KEB Ride-Thru.
138
Power loss shorter than L2-10
Power Loss
L2-11 (Desired DC Bus Voltage)
L2-05 (Uv Detection Level)
L2-10 (Minimum KEB
Operation Time)
KEB deceleration is
triggered by DC bus voltage
Figure 1.94 KEB Operation Using L2-10 and KEB Input
L1
L2
L3
UV Detection
Relay
Figure 1.95 KEB Function Wiring Example
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
0 V
0 V
KEB restart after
L2-02 has passed
KEB deceleration is
triggered by DC bus voltage
0 Hz
B1 B2
R/L1
U/T1
S/L2
V/T2
T/L3
W/T3
S6 - KEB command 1
S1 - Start command
SC
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)
M