YASKAWA P1000 Technical Manual page 244

5.8 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 5.76 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, 7A, 7B). Note that using System
KEB Ride-Thru requires an additional dynamic braking option.
Note: 1. 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.
2. A dynamic braking option is required to use System KEB 1 (L2-29 = 2).
n Parameters for KEB Ride-Thru
Table 5.35 lists parameters needed to set up KEB Ride-Thru depending on the type of KEB Ride-Thru selected in L2-29.
244
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 5.75 KEB Operation Using L2-10 and KEB Input
L1
L2
L3
UV Detection
Relay
Figure 5.76 KEB Function Wiring Example
0 V
0 V
KEB restart after
L2-02 has passed
KEB deceleration is
triggered by DC bus voltage
0 Hz
Braking
Required for System KEB
Resistor
Ride-Thru 1 only (L2-29 = 2)
B1 B2
R/L1
U/T1
S/L2
V/T2
T/L3
W/T3
S6 - KEB command 1 or 2
S1 - Start command
SC
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 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
KEB restart after
Operation
L2-02 has passed
Time)
M