Toshiba TOSVERT VF-PS1 - Selection of Restart Condition for Motor with Mechanical Brake

E6581386
F-56
6
6.26.21 Selection of a restart condition for the motor stopped with a mechanical brake
H : Brake-equipped motor restart condition selection
• Function
With this function, the motor can be restarted immediately after a stop if it is operated at a frequency of more
than 10Hz (20Hz or less) and stopped with a mechanical brake.
Use this function only when a mechanical brake is used to stop the motor. Using this function for a motor
without a mechanical brake, the inverter may be tripped or fail.
Title Function Adjustment range Default setting
H
Brake-equipped motor restart
condition selection
: Default (no waiting time for
frequencies of 10Hz and less)
: Conditional (no waiting time for
frequencies of 20Hz and less)

The timing chart in the figure below shows how the motor is operated and stopped with a mechanical brake.
By default, restart waiting time is set to prevent the inverter from being tripped because of the immediate restart of
the motor which started coasting at a frequency of more than 10Hz and stopped (when the ST function is assigned to
the S3 terminal, S3 signal is cut off).
This waiting time, however, is not necessary if a mechanical brake is used to stop the motor more reliably. When
using a mechanical brake to stop the motor, set this parameter H to  to allow the motor to restart immediately
after a stop if it started coasting at a frequency of 20Hz or less and stopped.
<Ex.
：When parameter H is set to .>

Starting signal
(S3 and F)
Mechanical brake
Output frequency [Hz]
0
20Hz
Time [s]
[
Note1
]
10Hz
Starting waiting time
Starting waiting time
When assigning the ST function to the S3 terminal,
Set H to  (to cancel its factory default setting:  = ST always active), and
Set H to  (to assign the ST function to the S3 terminal).
Note 1: By default, the restart waiting time shown in the figure is set, and the restart of the motor is delayed by the
time indicated by the dashed line.
Note 2: If the motor started coasting at a frequency of more than 20Hz, it will restart after the expiration of the waiting
time.