Toshiba VF-AS1 instruction manual Creepinjg frequency

E6581301

■Starting procedure

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.

■Stopping procedure

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.

! !!			Creepinjg frequency
Output frequency	Torque control Speed control	!		￿￿￿￿￿￿
[Hz]

	Starting frequency
	!	￿￿￿￿￿￿
	Torque!		￿￿￿￿￿￿
	Braking signal
	Braking operation
6	RUN command

￿￿￿￿￿ Time [s]

Issue of torque command

Brakingrequest

Brake release request

￿￿￿￿￿￿ ￿￿￿￿￿￿￿

Ex.) When using the OUT1 terminal as the brake signal output terminal

Title	Function	Adjustment range	Example of setting
￿￿￿￿￿	Output terminal function selection 1 (OUT1)	￿~￿￿￿	￿￿￿

■Learning function [￿￿￿￿]

Using this function, rough settings can be made automatically and also parameters ￿￿￿￿, ￿￿￿￿and ￿￿￿￿

can be set automatically.

[Learning operation]

Set parameter ￿￿￿￿ to ￿ and enter an operation command to start learning. (The frequency and “￿￿￿” are displayed alternately.)

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 motor-related constants.

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).

F-30