Execution Of "Brake Time Learning - Toshiba TOSVERT VF-S15 Instruction Manual

4.4.2 Execution of "Brake time learning"

The brake function sets automatically the timing (torque establishment when starting) of
the preliminary excitation by motor's constant value.
It is necessary to set related parameters before "brake time learning".
Before executing "brake time learning", the brake timing may not fit the load torque.
Execute "brake time learning" at no load or at light load that is 3% of rated load or less.
 Learning function (f348)
This function roughly adjusts the parameters f345, f346, and f347 automatically.
If necessary, fine adjust the parameter setting manually.
 Learning operation
Set parameter f348 to 1 and enter an operation command to start learning.
The frequency and "tun" are displayed alternately.
Parameter f343 (torque) is set, the brake release timing is calculated, and parameter f345
(release time) is set based on the calculation result. f346 is calculated and set automatically
based on the motor constant. At the stop of operation, f347 (creep time) is set.
Note 1: Learning should be performed under light-load conditions.
Note 2: If a counterweight is provided, a learning error may occur. If so, make an adjustment
manually.
Brake learning should be carried out for forward rotation if f341 is set to 1
Note 3:
(forward winding), or for reverse rotation if f341 is set to 2 (reverse winding).
《Notice for brake sequence function》
Note 4: For the brake sequence functions, the pre-excitation time is automatically determined
by the inverter from motor-related constants.
When the VFS15S-2022PL-W is used in combination with a Toshiba
4P-2.2kW-60Hz-200V standard motor, the pre-excitation time is approximately 0.1 to
0.2 seconds.
Depending on the motor, the pre-excitation time may be prolonged.
Note 5: Select the vector control in case of using brake sequence functions.
Set f460 and f462 following to the tables described in 4.3.
Set au2 (Torque boost setting macro function) =2 (vector control + auto-tuning) or
set motor constant parameters (f401f to 417) and pt (V/F control mode
selection) =3 (vector control).
Note 6: For checking the inverter operation by brake sequence functions, be sure to connect
and run the combined motor.
As this function calculates the brake timing by detecting output current, calculation
error occurs without connecting the motor.
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E6581871