Toshiba Tosvert VF-AS1 - Manual (Page 128)

E6581301
F-16
6
[Priority to DC braking during forward/reverse operation] (Forward/reverse run DC braking priority control H=[ON])
Time [s]
H
H
Output frequency [Hz]
Forward run signal (F-CC)
ON
OFF
Reference frequency
0
0
Set frequency
~ ~
~ ~
~ ~
~ ~
H
H
: DC braking
H H
(4) (5) (6)
Reverse run signal (R-CC)
ON
OFF
H
H= H=
H
(7)
(4) During normal forward/reverse run (H=) : Not recognized as a stop command, so that the DC
braking is not active.
(5) If a reverse run (or forward) command is entered during forward run (or reverse) (H=) :
DC braking when the frequency set with H
decreases below the reference frequency during
deceleration.
(6) If an operation command is entered during DC braking : RUN command has a priority.
(7) If an operation command is changed from ON to OFF during DC braking, DC braking is discontinued to stop the
operation.
6.8.2 Motor shaft fixing control
H : Motor shaft fixing control
• Function
This function is used to prevent the motor from running unexpectedly after the motor is stopped because
it’s shaft is not restrained or to preheat the motor.
[Parameter setting]
Title Function Adjustment range Default setting
H Motor shaft fixing control  :Disabled, :Enabled 
If the motor shaft fixing control parameter H is set at , DC braking continue at half a braking rate of that set with
H
to retain the motor after it has come to a full stop by DC braking. To terminate the motor shaft fixing control cut
off the standby signal (ST signal). Note, however, that this function doesn't operate after a DC braking command is
entered by control input terminal signal.