YASKAWA
TOEPYAIHV6002A HV600 Drive Programming
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.
■
L2-02: Power Loss Ride Through Time
No.
(Hex.)
Name
Description
Default
(Range)
L2-02
(0486)
Power Loss Ride Through
Time
Sets the maximum time that the drive will wait until it tries to restart after power loss.
Determined by o2-04
(0.0 - 25.5 s)
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.
■
L2-03: Minimum Baseblock Time
No.
(Hex.)
Name
Description
Default
(Range)
L2-03
(0487)
Minimum Baseblock Time
Sets the minimum time to continue the drive output block (baseblock) after a baseblock.
Determined by o2-04
(0.1 - 5.0 s)
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.
■
L2-04: Powerloss V/f Recovery Ramp Time
No.
(Hex.)
Name
Description
Default
(Range)
L2-04
(0488)
Powerloss V/f Recovery
Ramp Time
Sets the time for the drive output voltage to go back to the correct voltage after it completes speed
searches.
Determined by o2-04
(0.0 - 5.0 s)
Sets the time for voltage to recover from 0 V to the value set in
E1-05 [Maximum Output Voltage]
.
■
L2-05: Undervoltage Detection Lvl (Uv1)
No.
(Hex.)
Name
Description
Default
(Range)
L2-05
(0489)
Undervoltage Detection Lvl
(Uv1)
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.
Determined by o2-04 and
E1-01
(208 V Class: 150 - 220 V,
480 V Class: 300 - 440 V)
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.
V/f
OLV/PM
OLV/PM
EZOLV
V/f
OLV/PM
OLV/PM
EZOLV
V/f
OLV/PM
OLV/PM
EZOLV
V/f
OLV/PM
OLV/PM
EZOLV
