At the run command, the inverter makes the motor produce the torque specified with parameter . As soon
as a torque output command is issued, a brake release request signal is put out through the brake output terminal.
Upon expiration of the brake release time set with , the motor starts to accelerate.
At the stop command, the operation frequency is decreased to the creep frequency set with parameter ,
and put out the braking request after the creep time 1 set with . And then, the creep frequency is
maintained for the creep time set with . While the creep frequency is maintained, the brake release signal is
put out through the braking signal output terminal to apply the brake.
Ex.) When using the OUT1 terminal as the brake signal output terminal
Learning function 
Using this function, rough settings can be made automatically and also parameters , and
can be set automatically.
After the learning function is set, will be set automatically to and to . If necessary, fine
adjust the parameter setting manually.
Set parameter to and enter an operation command to start learning. (The frequency and "" are
Parameter (torque) is set, the brake release timing is calculated, and parameter (release time) is
set based on the calculation result. is set automatically according to the motor constant calculated. At the
stop of operation, (creep time) are set.
Note1: Learning should be performed under light-load conditions.
Note2: For the braking functions, the pre-excitation time is automatically determined by the inverter from
When the VFAS1-2037PL is used in combination with a Toshiba 4P-3.7kW-60Hz-200V standard motor, the
preliminary excitation time is approximately 0.1 to 0.2 seconds.
Depending on the motor used, the preliminary excitation time may be prolonged.
Note3: When using braking functions, set parameter (automatic torque boost) to (voltage vector control +
auto-tuning 1) or set motor-related parameters to .
Note 4: If a counterweight is provided, a learning error may occur. If so, make an adjustment manually.
Note 5: Brake learning (=) should be carried out for normal rotation if is set to (forward
winding), or for reverse rotation if is set to (reverse winding).
Issue of torque command
Brake release request
Output terminal function selection 1 (OUT1)