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External brake control is applicable for V/F control only, and the brake open frequency is
lower than close.
8.19 Kinetic energy buffering
Group
Code
Function
H64
group 2
H65
H66
H67
H37
When power failure occurs in the input power, DC link voltage of the inverter gets low and low voltage
defect occurs resulting a cut of the output. Its function is to maintain the voltage of DC link by
controlling output frequency of the inverter during the time of power failure. That is, it can keep the time
from the point of power failure to low voltage defect long.
H64 (KEB Select): Selects energy buffering operation when input power is cut. If H64 is set to 0, it
operates normal deceleration run until low voltage occurs. When H64 is set to 1, it controls the inverter
output frequency and charges the energy occurred from the motor to the inverter DC.
H 65(KEB operation start level), H 66(KEB operation stop level) : Selects starting and stopping point of
the energy buffering operation. Set the stop level(H65) higher than the start level(H 66) setting the low
voltage defect level as standard.
H 37(Load inertia) : Uses the momentum amount of the load inertia to control energy buffering
operation. If the inertia ratio is set high, the frequency change range gets small when running energy
buffering.
8.20 DRAW drive
Group
Function
Group 1
It‟s a kind of open loop tension control that uses the speed difference of motor running under main
frequency command to keep material‟s tension in between steady.
The output frequency selected according to the F70(DRAW mode select)
F70
Draw
Operation
Cx2000 AC Drive
Item
KEB operation select
KEB operation start level
KEB operation stop level
KEB operation gain
Load inertia
Code
Item
F70
DRAW mode select
F71
DRAW ratio
0
Draw not operated
1
AI V (0~10V) terminal input draw operation
2
AI I (0~20mA) terminal input draw operation
3
Potentiometer V2 (0~50V) input draw operation
Caution
Set Value
Setting Range
1
0~1
-
110.0 ~ 140.0
-
110.0 ~ 145.0
-
1 ~ 20000
0
0~2
Set Value
Setting Range
-
0 ~ 3
-
0.0 ~ 100.0
Chapter 8 Application
Initial
Unit
0
-
125.0
%
130.0
50
-
-
0
Initial
Unit
0
-
0.0
%
8-27
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