Toshiba H7 Operation Manuals page 167

F626
Overvoltage Stall Level
Program Protection Parameters
⇒
This parameter sets the upper DC bus voltage threshold that, once exceeded,
will cause an Overvoltage Stall. An Overvoltage Stall increases the output
frequency of the drive during deceleration for a specified time in an attempt to
prevent an Overvoltage Trip.
If the overvoltage condition persists for over 4 mS, an Overvoltage Trip will
be incurred.
Note: This feature may increase deceleration times.
Undervoltage Trip
Program Protection Parameters
⇒
This parameter Enables/Disables the Undervoltage Trip function. When the
DC bus voltage exceeds the settings of
is incurred. A user-selected contact may be actuated if so configured.
Undervoltage Detection Time
Program ⇒ Protection Parameters
This parameter sets the time that the undervoltage condition must exist to cause
an Undervoltage trip when this function is enabled at F627.
Undervoltage Stall level
Program ⇒ Protection Parameters
This parameter sets the low end of the DC bus voltage threshold that, once
exceeded, will cause an Undervoltage Stall.
An Undervoltage Stall reduces the output frequency of the drive for a specified
time in an attempt to prevent an Undervoltage Trip when this function is
Enabled at F627.
If the condition persists, an Undervoltage Trip will be incurred.
Note: This feature may decrease deceleration times.
Brake Trouble Internal Timer
Program ⇒ Protection Parameters
This parameter determines the delay time to be used in the event of a brake
failure. After a brake failure has occurred, this clock setting will begin to count
down. Once this time has elapsed, a signal will be provided to indicate that the
brake has failed.
This signal may be used to halt a related system function or to notify the user.
160
Stall
⇒
Undervoltage/Ridethrough
⇒
F628 and F629 an Undervoltage Trip
⇒ Undervoltage/Ridethrough
⇒ Undervoltage/Ridethrough
⇒ Brake Fault Timer
Direct Access Number — F626
Parameter Type — Numerical
Factory Default — (drive dependent)
Changeable During Run — Yes
Minimum — 50.0
Maximum — 250.0
Units — %
Direct Access Number — F627
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — No
Direct Access Number — F628
Parameter Type — Numerical
Factory Default — 0.03
Changeable During Run — No
Minimum — 0.00
Maximum — 10.00
Units — Seconds
Direct Access Number — F629
Parameter Type — Numerical
Factory Default — (drive dependent)
Changeable During Run — Yes
Minimum — 50.00
Maximum — 100.0
Units — %
Direct Access Number — F630
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 10.00
Units — Seconds
H7 ASD Operation Manual
F630