YASKAWA GA700 Technical Manual page 836

11.9 L: Protection Function
normal operation resumes. A Uv1 is detected once the time set in L2-02 elapses. If the KEB Ride-Thru is
canceled, the motor accelerates again, and normal operation resumes.
Figure 11.123 Cancel KEB Operation by Using the Momentary Power Loss Ride-Thru Time and KEB Ride-Thru
*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.
Cancel KEB Operation if Restoration of Power Occurs while the Control Power (Power Supply to the
Control Board) is Maintained
The following example illustrates an example when the configuration is as follows.
• L2-01 = 4 [KEB Stop Mode] is set.
• KEB Ride-Thru is not used.
The drive starts deceleration via KEB operation. After decelerating for the time set to parameter L2-10, the drive
checks the DC bus voltage level. Deceleration continues if the DC bus voltage is lower than the level set in L2-11
using the KEB Ride-Thru function. Normal operation resumes when the DC bus voltage rises above the value of
L2-11. The motor is accelerated to the frequency reference value used before the power loss, and normal operation
resumes.
Figure 11.124 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.
Cancel KEB Operation Using the KEB Ride-Thru if Restoration of Power Occurs while the Control Power
(Power Supply to the Control Board) is Maintained
The following example illustrates an example when the configuration is as follows.
• L2-01 = 4 is set.
• Use KEB Ride-Thru 1 [H1-xx = 65, 66] or KEB Ride-Thru 2 [H1-xx = 7A, 7B].
The drive starts deceleration via KEB operation. When the motor decelerates for the time set in L2-10, the drive
checks the DC bus voltage and the status of the digital input set for KEB Ride-Thru. Deceleration continues if the
DC bus voltage is still below the level set in L2-11, or if the digital input assigned to KEB Ride-Thru is still
active. If the voltage level has risen above the value set to L2-11, then normal operation is resumed. The motor is
836
Control Power (Power Supply to the Control Board) is Maintained
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual