YASKAWA GA800 Series Maintenance & Troubleshooting Download Page 226

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3.11 L: Protection Functions

226

YASKAWA

TOEPYAIGA8001B GA800 Drive Maintenance & Troubleshooting

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L2: Power Loss Ride Through

No.

(Hex.)

Name

Description

Default

(Range)

L2-01

(0485)

Power Loss Ride Through
Select

Sets the drive operation after a momentary power loss.

0 : Disable

1 : Enabled

2 : Enabled while CPU Power Active

3 : Kinetic Energy Backup: L2-02

4 : Kinetic Energy Backup: CPU Power

5 : Kinetic Energy Backup: DecelStop

Note:

When the CPU is inactive,

b1-17 [Run Command at Power Up]

sets operation at power up.

(0 - 5)

L2-02

(0486)

Power Loss Ride Through
Time

Sets the maximum time that the drive will wait until trying to restart after power loss.

Determined by o2-04, C6-01

(0.0 - 25.5 s)

L2-03

(0487)

Minimum Baseblock Time

Sets the minimum time to continue the drive output block (baseblock) after a baseblock.

Determined by o2-04, C6-01

(0.1 - 5.0 s)

L2-04

(0488)

Powerloss V/f Recovery
Ramp Time

Sets the time for the drive output voltage to go back to correct voltage after completing speed
searches.

Determined by o2-04, C6-01

(0.0 - 5.0 s)

L2-05

(0489)

Undervoltage Detection Lvl
(Uv1)

Sets the voltage at which a

Uv1 [DC Bus Undervoltage]

fault is triggered or at which the KEB

function is activated. Usually it is not necessary to change this setting.

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.

Determined by o2-04 and

E1-01

(200 V Class: 150 - 210 V,

400 V Class: 300 - 420 V)

L2-06

(048A)

Expert

Kinetic Energy Backup
Decel Time

Sets the deceleration time during KEB operation used to decrease the maximum output frequency to
0.

Note:

When

L2-29 = 1, 2, or 3 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2,

System KEB Ride-Thru 1, or System KEB Ride-Thru 2]

and you do KEB Auto-Tuning, the drive

will automatically set this value.

0.0 s

(0.0 - 6000.0 s)

L2-07

(048B)

Expert

Kinetic Energy Backup
Accel Time

Sets the acceleration time to return the frequency to the frequency reference before a power loss after
canceling KEB operation.

0.0 s

(0.0 - 6000.0 s)

L2-08

(048C)

Expert

Frequency Gain at KEB
Start

Sets the quantity of output frequency reduction used when KEB operation starts as a percentage of
the motor rated slip before starting KEB operation.

100%

(0 - 300%)

L2-09

(048D)

Expert

KEB Minimum Frequency
Level

Sets the quantity of output frequency reduction used as a percentage of

E2-02 [Motor Rated Slip]

when KEB operation starts.

20%

(0 - 100%)

L2-10

(048E)

Expert

Minimum KEB Time

Sets the minimum length of time to operate the KEB after the drive detects a momentary power loss.

50 ms

(0 - 25500 ms)

L2-11

(0461)

Expert

KEB DC Bus Voltage
Setpoint

Sets the target value that controls the DC bus voltage to a constant level in Single Drive KEB Ride-
Thru 2. Sets the DC bus voltage level that completes the KEB operation for all other KEB methods.

Determined by E1-01

(Determined by E1-01)

L2-29

(0475)

Expert

Kinetic Energy Backup
Method

Sets the KEB function operation mode.

0 : Single Drive KEB Ride-Thru 1

1 : Single Drive KEB Ride-Thru 2

2 : System KEB Ride-Thru 1

3 : System KEB Ride-Thru 2

(0 - 3)