YASKAWA HV600 Manual page 356

2.9 L: Protection Functions
No. Name
L2-11 KEB DC Bus Voltage Setpoint
L3-20 DC Bus Voltage Adjustment Gain
L3-21 OVSuppression Accel/Decel P Gain If there is large speed or current ripple, decrease the value in 0.05 unit increments.
L3-24 Motor Accel Time @ Rated Torque Set the motor acceleration time to the maximum frequency at the motor rated torque.
L3-25 Load Inertia Ratio
*1 When L2-29 = 0 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 1] and you do KEB Auto-Tuning, the drive will
automatically set C1-09. If you must not change the Fast Stop time, do not do KEB Tuning.
*2 The drive sets this value automatically when KEB Tuning completes correctly.
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L2-01: Power Loss Ride Through Select
No.
Name
(Hex.)
L2-01 Power Loss Ride Through
Select
(0485)
The drive detects momentary power loss when the drive DC bus voltage is less than the value set in L2-05
[Undervoltage Detection Lvl (Uv1)].
0 : Disabled
The drive detects Uv1 [DC Bus Undervoltage] when a there is a momentary power loss.
If you do not return power in 15 ms, it triggers Uv1 and the drive shuts off the output. The motor coasts to stop.
1 : Enabled for L2-02 Time
When power returns in the time set in L2-02 [Power Loss Ride Through Time], the drive will restart. If power does
not return in the time set in L2-02, the drive will detect Uv1.
The drive momentarily turns OFF its output after a power loss. If the power returns in the time set to L2-02, the drive
will do Speed Search and try to continue operation.
If the DC bus voltage is less than or equal to the Uv1 detection level for the time set in L2-02, the drive will detect
Uv1 and output a fault signal.
Note:
• The necessary time for the drive to restart after power returns is different for different drive capacities.
• The upper limit of the possible momentary power loss Ride-Thru time is different for different drive models.
2 : Enabled while CPU Power Active
When power returns and the drive control circuit has power, the drive will restart. This will not trigger Uv1.
When there is a momentary power loss, the drive output will turn OFF. If the power returns and the drive control
circuit has power, the drive will do Speed Search and try to continue operation. This will not trigger a Uv1. This
function enables longer support for power loss than when L2-01 = 1.
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• Single Drive KEB Ride-Thru 2
Set to approximately 1.22 × input voltage.
• Single Drive KEB Ride-Thru 1
Set to approximately 1.4 × input voltage.
• If ov or Uv1 occurs at the start of deceleration when you use KEB operation, increase this
value in 0.1-unit increments.
• If there is torque ripple during deceleration when you use KEB Ride-Thru, decrease the value.
Note:
If the setting value is too low, then the drive will have unsatisfactory DC bus voltage control
response. The drive can detect ov or Uv1.
Sets the ratio between motor inertia and machine inertia.
V/f OLV/PM EZOLV OLV/PM
Sets the drive operation after a momentary power loss.
Settings
Description
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
L2-29 [Kinetic Energy
Backup Method]
0 1
x x
- x
- x
- x
*2
- x
Default
(Range)
2
(0 - 2)