YASKAWA HV600 Manual page 357

Note:
When you set L2-01, make sure that you know these items:
• You can use a Momentary Power Loss Unit on models 2011 to 2059 and 4005 to 4021 for a longer momentary power loss ride through
time. A Momentary Power Loss Unit makes it possible to continue operation of the drive after a maximum of 2 seconds of power loss.
• When you set L2-01 = 1 or 2, keep the magnetic contactor on the drive input side closed and keep the control signal while the drive does
KEB operation.
• When L2-01 = 1 or 2, Uv [DC Bus Undervoltage] will flash on the keypad while the drive is attempting to recover from a momentary
power loss. The drive will not output a fault signal at this time.
• When you use a magnetic contactor between the motor and the drive, keep the magnetic contactor closed while the drive does KEB
operation or tries to restart with Speed Search.
• Keep the Run command active during KEB operation. The drive cannot accelerate back to the frequency reference when the power returns.
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L2-02: Power Loss Ride Through Time
No.
Name
(Hex.)
L2-02 Power Loss Ride Through
Time
(0486)
This function is applicable when L2-01 = 1 [Power Loss Ride Through Select = Enabled for L2-02 Time]. If power
loss operation is longer than the time set in this parameter, the drive will detect Uv1 [DC Bus Undervoltage], turn
OFF output, and the motor will coast to stop.
Note:
• The length of time that the drive can recover after a power loss changes when drive capacity changes.
• The upper limit of the possible momentary power loss Ride-Thru time changes when drive capacity changes.
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L2-03: Minimum Baseblock Time
No.
Name
(Hex.)
L2-03 Minimum Baseblock Time
(0487)
Sets the length of time that the drive will wait for the residual voltage in the motor to dissipate in estimation to the
secondary circuit time constant of the motor. If oC [Overcurrent] or ov [DC Bus Overvoltage] occur at the start of
Speed Search, after power returns, or during DC Injection Braking, increase this setting.
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L2-04: Powerloss V/f Recovery Ramp Time
No.
Name
(Hex.)
L2-04 Powerloss V/f Recovery
Ramp Time
(0488)
Sets the time for voltage to recover from 0 V to the value set in E1-05 [Maximum Output Voltage].
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L2-05: Undervoltage Detection Lvl (Uv1)
No.
Name
(Hex.)
L2-05 Undervoltage Detection Lvl
(Uv1)
(0489)
NOTICE: Damage to Equipment. When you set this parameter to a value lower than the default, you must install an AC reactor on
the input side of the power supply. If you do not install an AC reactor, it will cause damage to the drive circuitry.
Note:
If the low voltage detection level is near the lower limit value of L2-05, the drive will detect Uv1 during KEB Ride-Thru operation. Do not
set the value too low when you use the KEB Ride-Thru function.
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
V/f OLV/PM EZOLV OLV/PM
Sets the maximum time that the drive will wait until it tries to restart after power loss.
V/f OLV/PM OLV/PM EZOLV
Sets the minimum time to continue the drive output block (baseblock) after a baseblock.
V/f OLV/PM OLV/PM EZOLV
Sets the time for the drive output voltage to go back to the correct voltage after it completes speed
searches.
V/f OLV/PM EZOLV OLV/PM
Sets the voltage at which the drive triggers a Uv1 [DC Bus Undervoltage] fault or at which it
activates the KEB function. Usually it is not necessary to change this setting.
Description
Description
Description
Description
2.9 L: Protection Functions
Default
(Range)
Determined by o2-04
(0.0 - 25.5 s)
Default
(Range)
Determined by o2-04
(0.1 - 5.0 s)
Default
(Range)
Determined by o2-04
(0.0 - 5.0 s)
Default
(Range)
Determined by o2-04 and
E1-01
(208 V Class: 150 - 220 V,
480 V Class: 300 - 440 V)
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