YASKAWA GA700 Technical Manual page 948

11.9 L: Protection Functions
operation continues. If the time set in L2-02is expired, the drive detects Uv1. When you cancel the KEB Ride-
Thru, the motor accelerates again, and usual operation continues.
Figure 11.129 Use the Momentary Power Loss Ride-Thru Time and KEB Ride-Thru to Cancel KEB Operation
*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.
Cancel KEB Operation When Restoration of Power Occurs while the Control Power (Power Supply to the
Control Board) is Maintained
Figure 11.130 shows an example with this configuration:
• L2-01 = 4 [Kinetic Energy Backup: CPU Power] is set.
• KEB Ride-Thru is not used.
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 11.130 Cancel KEB Operation without Using the KEB Ride-Thru if Restoration of Power Occurs while the
*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 11.131 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 voltage level is more than the value set to L2-11, usual operation continues. The drive
948
Control Power (Power Supply to the Control Board) is Maintained
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual