F628

F630

Undervoltage Trip Detection Time

Program Protection Undervoltage/Ridethrough

This parameter sets the time that the undervoltage condition must exist to cause an Undervoltage trip.

This parameter is enabled at F627.

Direct Access Number — F628

Parameter Type — Numerical

Factory Default — 0.03

Changeable During Run — No

Minimum — 0.01

Maximum — 10.00

Units — Seconds

Regenerative Power Ridethrough Control Level

Program Protection Undervoltage/Ridethrough

This parameter is activated during regeneration. It is used to set the low end of the DC bus voltage threshold that, once the bus voltage drops below this setting, activates the setting of F302 (Ridethrough Mode).

Activation may be the result of a momentary power loss or an excessive load on the bus voltage.

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 or may continue seamlessly if so configured.

See F302 for more information on this parameter.

Direct Access Number — F629

Parameter Type — Numerical

Factory Default — (ASD-dependent)

Changeable During Run — No

Minimum — 55

Maximum — 100

Units — %

Note: This parameter setting may increase deceleration times.

Brake Answer Wait Time

Program Protection Special Protection Parameters

This parameter is used in conjunction with the discrete input terminal setting Brake Answerback Input (see Table 5 on pg. 236 for more information on this feature).

After activating the discrete input terminal Braking Request, the setting of this parameter starts a count-down timer in which 1) a Brake Answerback Input response must be received or 2) the brake must release before the timer expires.

Should this timer setting expire before the Brake Answerback Input is returned or the brake releases, a Brake Fault (E-11) is incurred. Otherwise, the brake releases and normal motor operations resume.

Direct Access Number — F630

Parameter Type — Numerical

Factory Default — 0.0 (Disabled)

Changeable During Run — Yes

Minimum — 0.0 (Disabled)

Maximum — 10.0

Units — Seconds

188

H9 ASD Installation and Operation Manual

Page 196
Image 196
Toshiba H9 operation manual F628 F630, Undervoltage Trip Detection Time, Regenerative Power Ridethrough Control Level