YASKAWA VS-616G5 Series Programming Manual page 105

L2-03 Minimum Baseblock Time
Setting Range:
Factory Default:
After momentary power loss has occurred, the motor may have residual voltage. This can cause excess
current to be drawn by the motor when operation restarts, and can trip the inverter. The minimum base-
block time allows the inverter to wait for this residual voltage to dissipate before restarting. This is
only effective when L2-02 is set to "1"or "2".
After momentary power loss:
· If the minimum baseblock time (L2-03) is greater than the power loss ridethrough time (L2-02 or con-
trol logic time), then operation restarts after the minimum baseblock time elapses.
· If the minimum baseblock time is less than the power loss ridethrough time, then operation restarts
after the power loss ridethrough time elapses.
L2-04 Voltage Recovery Time
Setting Range:
Factory Default:
When operation restarts after momentary power loss, speed search is activated in order to detect the
motor speed. After speed search is complete, the time for the output voltage to increase to its previous
level (before power loss) is defined by the voltage recovery time.
L2-05 Undervoltage Detection Level
Setting Range:
Factory Default:
Sets the inverter main circuit DC bus undervoltage level.
When setting this value less than the factory default, it is necessary to install an AC reactor on the input
side. The AC reactor reduces peak current input to the inverter and smooths out the DC bus current rip-
ple when operating at low voltages.
L2-06 Kinetic Energy Braking Frequency Constant
Setting Range:
Factory Default:
This parameter allows for setting the load inertia ridethrough level, as a percentage of output fre-
quency. This setting is used in conjunction with multi-function contact inputs set for KEB ridethrough
(H1-__ = "65" or "66"), after momentary power loss. When the KEB frequency constant is set to "0",
KEB ridethrough functions as normal, to maintain a controlled deceleration rate for the longest time
possible, during a momentary power loss (see section H1, Digital Inputs, on page 76 for more details).
When the KEB frequency constant is set to any value other than "0", KEB ridethrough for systems use
is enabled.
VS-616G5 Programming Manual
0.1 to 5.0s
Inverter model dependent
0.0 to 5.0s
Inverter model dependent
150 to 210V (230V class), 300 to 420V (460V class), 431 to 603V (575V class)
190V (230V class), 380V (460V class), 546V (575V class)
0 to 100%
0%
Section L: Protection Parameters
L2 Power Loss Ridethrough
PwrL Baseblock t
PwrL V/f Ramp t
PUV Det Level
KEB Frequency
B B B B
A A A A
A A A A
A A A A
105