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 —
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
Should this timer setting expire before the Brake Answerback Input is returned or the brake releases, a Brake Fault
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 |
