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188 H9 ASD Installation and Operation Manual
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.
Note: This parameter setting may increase deceleration times.
Direct Access Number — F629
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — No
Minimum — 55
Maximum — 100
Units — %
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
F628 F630