Selection Of A Restart Condition For The Motor Stopped With A Mechanical Brake - Toshiba VF-PS1 Instruction Manual

6.26.20 Selection of a restart condition for the motor stopped with a mechanical brake

: 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
Brake-equipped motor restart

condition selection
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  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  is set to .>
Output frequency [Hz]
Starting signal
(S3 and F)
Mechanical brake
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.
Function
20Hz
10Hz
0
Starting waiting time
When assigning the ST function to the S3 terminal,
Set  to  (to cancel its factory default setting:  = ST always active), and
Set  to  (to assign the ST function to the S3 terminal).
F-55
Adjustment range
: Default (no waiting time for
frequencies of 10Hz and less)
: Conditional (no waiting time for
frequencies of 20Hz and less)
[ ]
Note1
E6581386
Default setting

Time [s]
Starting waiting time
6