12.8 L: PROTECTION
746 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Figure 12.123 Cancel KEB Operation without Using the KEB Ride-Thru if Restoration of Power Occurs while the
Control Power (Power Supply to the Control Board) is Maintained
*1 When setting L2-07 = 0.00, the drive reaccelerates in accordance with the valid Acceleration Time [C1-01,
C1-03, C1-05, C1-07], and normal operation resumes.
Use the KEB Ride-Thru to Cancel KEB Operation when Restoration of Power Occurs while the Control
Power (Power Supply to the Control Board) is Maintained
Figure 12.124 shows an example with this configuration:
• L2-01 = 4.
• Use KEB Ride-Thru 1 [H1-xx = 40, 41] or KEB Ride-Thru 2 [H1-xx = 42, 43].
The drive starts deceleration through KEB operation. When the motor decelerates for the time set in L2-10, the
drive measures the DC bus voltage and the status of the digital input set for KEB Ride-Thru. When the DC bus
voltage is less than the level set in L2-11, or if the digital input set to KEB Ride-Thru is active, deceleration
continues. When the voltage level is more than the value set to L2-11, usual operation continues. The drive
accelerates the motor to the frequency reference value before the power loss, and usual operation continues. When
the KEB Ride-Thru continues to be input after the time set in L2-02 is expired, the drive uses the KEB Ride-Thru
function to continue to decelerate. When you cancel the KEB Ride-Thru, the motor accelerates again, and usual
operation continues.
Figure 12.124 Use the KEB Ride-Thru to Cancel KEB Operation when Restoration of Power Occurs while the Control
Power (Power Supply to the Control Board) is Maintained
*1 When L2-07 = 0.00, the drive accelerates again as specified by the applicable Acceleration Time [C1-01, C1-
03, C1-05, C1-07], and usual operation continues.
KEB Operation when L2-01 = 5 [Kinetic Energy Backup: DecelStop]
The drive starts deceleration through KEB operation. The drive will continue to decelerate until the motor comes
to the minimum output frequency or a complete stop. If you return power during deceleration, the drive continues
to decelerate. If you do not input the Run command, the motor cannot restart.
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