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134 H9 ASD Installation and Operation Manual

Regenerative Power Ridethrough Mode

Program ⇒ Protection ⇒ Undervoltage/Ridethrough

This parameter determines the motor-control response of the drive in the event

of a momentary power outage or undervoltage condition.

During a Ridethrough, regenerative energy is used to maintain the control

circuitry settings for the duration of the Ridethrough; it is not used to drive the

motor. The motor(s) of the system are stopped and then restarted automatically

if so configured.

In a multiple-motor application, there will be a requirement to synchronize the

stopping and restarting of the motors as not to cause breakage in the product

being processed by the motors stopping/starting at different times (e.g., wire

spools, bobbin winder for textile machines, etc.). Parameters

F317 and F318

must be setup to synchronize motor operation as to avoid breakage in these

types of applications.

Note: If used to restart the motors, the Retry setup of F301 is required.

Note: The Jog function will not operate while in the Synchronized

Decel/Accel mode.

Settings:

0 — Off

1 — Ridethrough On

2 — Decel Stop (during power failure)

3 — Synchronized ACC/DEC (TB)

4 — Synchronized ACC/DEC (TB + Power Off)

Ridethrough Setup Requirements

1. Select the Ridethrough Mode at F302.

2. Select the Ridethrough Time at F310.

3. Select the Synchronized Stop/Start Times at F317/F318 (if required).

Note: F317 and F318 are not functional while operating in the Torque

or Position control modes, or for the Jog Run function (F260).

4. Set a discrete input terminal to Power Failure Synchronized Signal and

activate the terminal to enable the Synchronized Accel/Decel function.

5. Select the Ridethrough Control Level at F629.

Direct Access Number — F302

Parameter Type — Selection List

Factory Default — Off

Changeable During Run — Ye s

F302 F302

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Toshiba H9 Manuel d'utilisateur Page 142