Dc Braking - Toshiba VF-PS1 Instruction Manual

Output frequency [Hz]
DC braking start frequency

Output current [A]
Operation signal (F-CC)
<DC braking start conditions>
The forward/reverse DC braking priority control function  recognizes certain conditions such as stop
commands from the inverter, and is activated when the output frequency goes down below the DC braking start
frequency set with . In this case, the conditions under which DC braking starts include not only the issue of a
start or stop command from the operation panel or an external input device, but also a fall in the reference frequency
below the value set with  (stop frequency setting) or a fall in the output frequency below the operation stop
frequency setting .
6
[DC braking under normal conditions] (Forward/reverse run DC braking priority control = [Disabled])
Output frequency [Hz]
Set frequency
Reference frequency
Operation signal (F-CC)
(1) If  and  > reference frequency
(2) If  > reference frequency > 
If  and  > reference frequency
(3) If an operation command is entered during DC braking : DC braking is discontinued to restart the operation.
Set frequency
0
0


0
(1)


0
Note:During DC braking, the DC braking
LED display
 displayed

DC braking

Time [s]
DC braking current
DC braking time

ON
OFF

(2) (2)
: DC braking
: Operation at the command frequency
: DC braking
F-14
E6581386
current may be adjusted
automatically to prevent the overload
protection function from being
activated and causing the inverter to
trip.
The DC braking current may be
adjusted automatically to prevent
tripping.
When the inverter is used with a
standard motor, setting the
percentage of DC braking (  )
above 60% may activate the thermal
protection function to prevent the
motor from being overloaded,
depending on the setting of 
(DC braking time).

: DC braking

Time [s]
(3)
ON
OFF