YASKAWA GA700 Technical Manual page 840

11.9 L: Protection Function
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L2-02: MomentaryPowerLossRide-Thru Time
No.
Name
(Hex.)
L2-02 MomentaryPower
LossRide-Thru Time Sets the maximum time allowed to ride through a power loss until the drive
(0486)
This function is valid when L2-01 = 1, 3 [Momentary Power Loss Ope Select = Enbl with Timer, KEB Mode]. If
power loss operation exceeds this timeUv1 [DC Bus Undervoltage] is detected, and the drive shuts off its output.
The motor coasts to stop.
Note:
• The amount of time the drive is capable of recovering after a power loss is determined by the capacity of the drive.
• Drive capacity determines the upper limit of the possible momentary power loss Ride-Thru time.
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L2-03: Momentary Power Loss Min BB Time
No.
Name
(Hex.)
L2-03 Momentary Power
Loss Min BB Time
(0487)
Sets the time for the drive waits for the residual voltage in the motor to dissipate in approximation to the
secondary circuit time constant of the motor. Increase this setting if an oC [Overcurrent] or ov [DC Bus
Overvoltage] occurs at the beginning of Speed Search, after a power loss, or during DC Injection Braking.
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L2-04: MomentPowLossVolRecoveryRampTime
No.
Name
(Hex.)
L2-04 MomentPowLossVol
RecoveryRampTime Sets the time for the drive output voltage to return to normal voltage after
(0488)
Sets the time for voltage to recover from 0V to the value set in E1-05 [Maximum Output Voltage].
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L2-05: Undervoltage Detect Level (Uv1)
No.
Name
(Hex.)
L2-05 Undervoltage Detect
Level (Uv1)
(0489)
Note:
• Install an AC reactor option on the input side of the power supply when setting undervoltage detection level below the default value to
prevent damage to drive circuitry.
• Uv1 are likely to be detected during operation of the KEB Ride-Thru if the low voltage detection level approaches the lower limit value
of L2-05. Do not set the value too low when using the KEB Ride-Thru function.
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L2-06: KEB Deceleration Time
No.
Name
(Hex.)
L2-06 KEB Deceleration
Time
(048A)
This function is enabled when L2-29 = 2 or 3 [KEB Method Selection = System KEB Ride-Thru 1 or System KEB
Ride-Thru 2].
Sets the deceleration time required to decelerate from the frequency reference to 0 Hz when a momentary power
loss is detected. Decrease the deceleration time if an Uv1 [DC Bus Undervoltage] fault occurs during KEB
operation. Increase the deceleration time when ov [Overvoltage] faults are detected.
840
V/f CL-V/f OLV CLV AOLV
restart is compensated.
V/f CL-V/f OLV CLV AOLV
Sets the minimum baseblock time when power is restored following a
momentary power loss.
V/f CL-V/f OLV CLV AOLV
completion of speed searches.
V/f CL-V/f OLV CLV AOLV
Determines the voltage at which a Uv1 [DC Bus Undervoltage] fault is
triggered or at which the KEB function is activated. Normally there is no
need to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets the deceleration time during KEB operation used to reduce the
maximum output frequency to 0.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
Determined by o2-04
and C6-01
(0.0 - 25.5 s)
Default
(Range)
Determined by o2-04
and C6-01
(0.1 - 5.0 s)
Default Setting
(Range)
Determined by o2-04
and C6-01
(0.0 - 5.0 s)
Default
(Range)
Determined by E1-01
(Determined by E1-
01)
Default Setting
(Range)
0.0 s
(0.0 to 6,000.0 s)