Minimum Baseblock Time: L2-03; Voltage Recovery Time: L2-04; Undervoltage Detection Level: L2-05; Keb Deceleration Rate: L2-06 - YASKAWA VARISPEED-616G5 Instruction Manual

7.5.6 Protective Functions: L
7

Minimum Baseblock Time: L2-03

User User
Name
Constant
Number
L2-03 Min. baseblock time
The factory setting depends on the Inverter capacity. The factory setting shown in the table is for a 200
D
V class, 0.4 kW Inverter. (See page 8 - 47.)
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)
D
occurs when the speed search or DC injection braking function starts.
This setting is valid for speed searches performed after a momentary power loss and regular speed
D
searches.

Voltage Recovery Time: L2-04

User User
Constant Name
Number
Voltage recovery
L2-04
time
Set the time allowed for the normal voltage to be restored after completion of the speed search.
D
For a 200 V class Inverter, this is the time in seconds for voltage to be restored from 0 VAC to 200 VAC.
For a 400 V class Inverter, this is the time in seconds for voltage to be restored from 0 VAC to 400 VAC.
This setting is valid for speed searches after a momentary power loss, regular speed searches, the volt-
D
age changes with energy-saving control, and the voltage changes with baseblock clearing.

Undervoltage Detection Level: L2-05

User User
Constant Name
Number
Undervoltage detec-
L2-05
tion level
The values in parentheses are for 400 V class Inverters. (See page 8 - 49.)
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 detec-
D
tion level. Be sure to set a main circuit DC voltage value (V) that will detect a main circuit undervol-
tage.

KEB Deceleration Rate: L2-06

User User
Name
Constant
Number
KEB deceleration
L2-06
rate
The KEB function restores the operating conditions for momentary power loss by applying a frequen-
D
cy deceleration to create inertia energy when a power loss occurs, and thus avoid the power loss.
This function is normally used with film lines and other applications where multiple Inverters are con-
D
nected to the main DC line. Synchronous deceleration for power loss prevents the line from stopping
as the result of speed fluctuations.
The KEB operation is performed using a KEB command (setting of 65 or 66) for a multi-function in-
D
put.
Applicable Capacities
D
200 V class Inverters: 0.4 to 15 kW
400 V class Inverters: 0.4 to 18.5 kW
Operation
L2-06 = 0
D
The motor is automatically decelerated 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.
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0.1 to 5.0 s
×
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0.0 to 5.0 s
×
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
150 to 210
VDC
×
(300 to 420)
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0.0 to 100.0 0.1
×
7 - 86
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
0.5 B B B
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
A A A
0.3
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
190
A A A
(380)
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
0.0 A A A
Flux
Vector
B
Flux
Vector
A
Flux
Vector
A
Flux
Vector
A