YASKAWA HV600 Manual page 355

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KEB Operation Wiring Example
Figure 2.86 shows an example that uses an undervoltage relay to trigger the KEB Ride-Thru at power loss. When a
power loss occurs, the undervoltage relay triggers KEB Ride-Thru [H1-06 = 65, 66, 7A, 7B] at terminal S6.
Note:
Configure the drive to turn ON the Run command while the KEB function is operating. If you turn off the Run command, the drive will not
accelerate back to speed when you return power.
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Parameters for KEB Ride-Thru
Table 2.58 shows the parameters that adjust the KEB Ride-Thru function. Parameter settings are different for the
different KEB methods set in L2-29 [Kinetic Energy Backup Method].
No. Name
C1-09 Fast Stop Time
C2-03 S-Curve Time @ Start of Decel
L2-05 Undervoltage Detection Lvl (Uv1)
L2-06 Does KEB Tuning.
L2-07 Kinetic Energy Backup Accel Time Sets the acceleration time to return to the frequency reference value before a power loss, after
L2-08 Frequency Gain at KEB Start
L2-10 Minimum KEB Time
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
Figure 2.86 KEB Function Wiring Example
Table 2.58 Parameters for KEB Ride-Thru
• If ov [Overvoltage] occurs during KEB deceleration, increase the setting value.
• If Uv1 [DC Bus Undervoltage] occurs during KEB deceleration, decrease the setting value.
• If ov occurs immediately after you start KEB deceleration, increase the setting value.
• If Uv1 occurs immediately after you start KEB deceleration, decrease the setting value.
If Uv1 occurs immediately after you start KEB deceleration, increase the setting value to detect
power loss more quickly.
• Kinetic Energy Backup Decel Time
• If ov or Uv1 occur during KEB deceleration after KEB Tuning, set L2-06 in these conditions:
– If ov occurs, increase the setting value
– If Uv1 occurs, decrease the setting value.
you cancel the KEB operation. When L2-07 = 0, the drive uses the standard acceleration times
set in C1-01 and C1-03.
• If ov occurs immediately after you start operation, decrease the setting value.
• If Uv1 occurs immediately after you start operation, increase the setting value.
• With KEB Ride-Thru
There is Uv1 because you set a digital input for KEB Ride-Thru and the device that controls
the input operated too slowly after power loss.
• Without KEB Ride-Thru
If the DC bus voltage overshoots immediately after KEB Ride-Thru starts, increase L2-10 to
longer than the overshoot.
2.9 L: Protection Functions
Settings
L2-29 [Kinetic Energy
Backup Method]
0 1
*1
x -
x -
x x
- -
x x
x -
2
x x
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