910
YASKAWA
SIEPC71061737B GA800 Drive Technical Reference
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 12.127 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.
KEB Operation when L2-01 = 5 [Kinetic Energy Backup: DecelStop]
The drive starts deceleration through KEB operation. If you do not input the Run command, the motor cannot restart.
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.
■
KEB Operation Wiring Example
shows an example that uses an undervoltage relay to trigger the KEB Ride-Thru at power loss. When a
power loss occurs, the undervoltage relay triggers
KEB Ride-Thru [H1-06 = 65, 66, 7A, 7B]
at terminal S6.
Note:
•
Configure the drive to turn ON the Run command while the KEB function is operating. If you turn off the Run command, the drive will not
accelerate back to speed when you return power.
•
A dynamic braking option is necessary for
System KEB Ride-Thru 1 [L2-29 = 2].
.
Содержание GA800 Series
Страница 2: ...This Page Intentionally Blank 2 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 20: ...i 3 Warranty Information 20 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 30: ...1 3 Features and Advantages of Control Methods 30 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 58: ...2 9 Installation Methods 58 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 144: ...4 4 Start up Procedures 144 YASKAWA SIEPC71061737B GA800 Drive Technical Reference Figure 4 8 Basic Steps before Startup...
Страница 268: ...5 6 Safe Disable Input 268 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 306: ...6 3 MEMOBUS Modbus Communications 306 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 370: ...7 10 Troubleshooting Without Fault Display 370 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 426: ...8 7 Storage Guidelines 426 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...