Parameter Details
2
2.9 L: Protection Functions
YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING 367
The drive starts deceleration through KEB operation. The drive decelerates for the time set in parameter L2-10, and
then measures the DC bus voltage level. When the DC bus voltage is lower than the level set in L2-11, the drive uses
the KEB Ride-Thru function to continue deceleration. When the DC bus voltage is more than the level set in L2-11,
usual operation continues. The drive accelerates the motor to the frequency reference value before the power loss, and
usual operation continues.
Figure 2.106 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 L2-07 = 0.00 s, the drive accelerates again as specified by the applicable Acceleration Time [C1-01, C1-
03, C1-05, C1-07], and usual operation continues.
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
shows an example with this configuration:
• L2-01 = 4.
• Use KEB Ride-Thru 1 [H1-xx = 65, 66] or KEB Ride-Thru 2 [H1-xx = 7A, 7B].
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
DC bus voltage is more than the level set in L2-11, the drive ends KEB operation. 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 2.107 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 s, the drive accelerates again as specified by the applicable Acceleration Time [C1-01, C1-
03, C1-05, C1-07], and usual operation continues.
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