80
7.7. Area F (Built-in DB (Dynamic Braking) Operation, Protection Function, Traceback
Setting Area)
Built-in DB (Dynamic Braking) operation level setting
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
F-00
Built-in DB (Dynamic Braking)
operation level
(200 V class) 320.0 to 360.0
0.1
340.0
V
(400V class) 640.0 to 720.0
0.1
680.0
V
Built-in DB (Dynamic Braking) operation level (F-00):
A transistor for DB (Dynamic Braking) is incorporated in VF66B-2R222 to 2222 (200 V class) and
VF66B-2R244 to 2244 (400 V class) allowing to perform the dynamic braking by connecting a DB (Dynamic
Braking) resistor and thermal relay between main circuit terminal blocks [+2] and [B] using a screwdriver
or
one of six point box-end wrenches M4 to M12. In the built-in DB (Dynamic Braking) operation level (F-00)
setting, set the operation level of this built-in DB (Dynamic Braking) transistor. When the DC voltage rises
beyond this setting, the built-in DB (Dynamic Braking) transistor is turned on. When the DC voltage falls below
this setting, the built-in DB (Dynamic Braking) transistor is turned off. Usually, leave this setting at the initial
value. When the power source voltage is high causing the built-in DB (Dynamic Braking) transistor to be
turned on even in other than brake mode, set a higher value.
* When using this function in combination with a sine wave converter (VF61R, VF64R), set this setting to 360 V (200 V
class) or 720 V (400 V class).
Over speed protection settings
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
F-01
Forward overspeed protection setting
0.0 to 150.0
0.1
105.0
%
F-02
Reverse overspeed protection setting
-150.0 to 0.0
0.1
-105.0
%
Forward overspeed protection setting (F-01), reverse overspeed protection setting (F-02):
In these parameters, set the ratio to the maximum speed (%).
When the motor speed exceeds the forward overspeed protection setting (F-01) or reverse overspeed
protection setting (F-02), the overspeed protection function (oS) activates to perform protective detection. Set
for forward and reverse individually. (When you change the maximum speed (A-00), also change these
settings.) Incidentally, these settings become the maximum speed (A-00) when set to 100%.
Warning
[Overspeed protection setting]
In the forward overspeed protection setting (F-01) and reverse overspeed protection setting (F-02),
do not set a value significantly exceeding the rated motor speed.
It may result in a risk of serious accidents.
Overload protection setting
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
F-03
Overload protection setting
20 to 110
1
100
%
