Yaskawa G5HHP Drive User Manual
Page 251
7.5 Common Functions
7 - 87
Minimum Baseblock Time: L2-03
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L2-03
Min. baseblock time
x
0.0 to 25.5
s
10.0
B
B
B
B
D
The factory setting depends on the Inverter capacity. The factory setting shown in the table is for a 400-V
class, 200 kW Inverter. (See page 8 - 42.)
D
This setting is used with the speed search and DC injection braking functions.
D
Set the time required for the leakage voltage to dissipate. Increase the setting if an overcurrent (OC)
occurs when the speed search or DC injection braking function starts.
D
This setting is valid for speed searches performed after a momentary power loss and regular speed
searches.
Voltage Recovery Time: L2-04
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L2-04
Voltage recovery time
x
0.0 to 5.0
s
0.3
A
A
A
A
D
Set the time allowed for the normal voltage to be restored after completion of the speed search.
For a 400-V class Inverter, this is the time in seconds for voltage to be restored from 0 VAC to 400 VAC.
For a 575-V class Inverter, this is the time in seconds for voltage to be restored from 0 VAC to 575 VAC.
D
This setting is valid for speed searches after a momentary power loss, regular speed searches, the voltage
changes with energy-saving control, and the voltage changes with baseblock clearing.
Undervoltage Detection Level: L2-05
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L2-05
Undervoltage detec-
tion level
x
300 to 420
(430 to 600) VDC
380
(570)
A
A
A
A
D
The values in parentheses are for 575-V class Inverters. (See page 8 - 43.)
D
Normally it isn’t necessary to change this setting.
D
Use this constant when you want to add an AC reactor and lower the main circuit undervoltage detection
level. Be sure to set a main circuit DC voltage value (V) that will detect a main circuit undervoltage.
KEB Deceleration Rate: L2-06
Although L2-06 is displayed on the Digital Operator, it cannot be set.
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L2-06
KEB deceleration rate
x
0.0 to 100.0
0.1
0.0
A
A
A
A
D
The KEB function restores the operating conditions for momentary power loss by applying a frequency
deceleration to create inertia energy when a power loss occurs, and thus avoid the power loss.
D
This function is normally used with film lines and other applications where multiple Inverters are con-
nected to the main DC line. Synchronous deceleration for power loss prevents the line from stopping
as the result of speed fluctuations.
D
The KEB operation is performed using a KEB command (setting of 65 or 66) for a multi-function input.
D
Applicable Capacities: 400-V class Inverters: 0.4 to 18.5 kW.
Operation
D
L2-06 = 0
The motor is automatically accelerated based on the emergency stop time (C1-09) so that the DC main-
line voltage does not go below the UV level. The momentary power loss ridethru time (L2-02) is not
used.
7
IMPORTANT