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H9 ASD Installation and Operation Manual 187
Abnormal Speed Detection Time
Program ⇒ Protection ⇒ Abnormal Speed Settings
This parameter sets the time that an overspeed condition must exist to cause a
trip.
This parameter functions in conjunction with the settings of F623 and F624.
Direct Access Number — F622
Parameter Type — Numerical
Factory Default — 0.01
Changeable During Run — Yes
Minimum — 0.01
Maximum — 100.00
Units — Seconds
Over-speed Detection Frequency Upper Band
Program ⇒ Protection ⇒ Abnormal Speed Settings
This parameter sets the upper level of the Base Frequency range that, once
exceeded, will cause an Overspeed Detected alert.
This parameter functions in conjunction with the settings of F622 and F624.
Direct Access Number — F623
Parameter Type — Numerical
Factory Default — 0.0 (Disabled)
Changeable During Run — Yes
Minimum — 0.0 (Disabled)
Maximum — 30.00
Units — Hz
Over-speed Detection Frequency Lower Band
Program ⇒ Protection ⇒ Abnormal Speed Settings
This parameter sets the lower level of the Base Frequency range that, once the
output speed falls below this setting, will cause a Speed Drop Detected alert.
This parameter functions in conjunction with the settings of F622 and F623.
Direct Access Number — F624
Parameter Type — Numerical
Factory Default — 0.00 (Disabled)
Changeable During Run — Yes
Minimum — 0.00 (Disabled)
Maximum — 30.00
Units — Hz
Overvoltage Limit Operation Level
Program ⇒ Protection ⇒ Stall
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.
This parameter is enabled at F305.
Note: This parameter setting may increase deceleration times.
Direct Access Number — F626
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — Yes
Minimum — 100
Maximum — 150
Units — %
Undervoltage Trip
Program ⇒ Protection ⇒ Undervoltage/Ridethrough
This parameter Enables/Disables the Undervoltage Trip function.
With this parameter Enabled, the ASD will trip if the undervoltage condition
persists for a time greater than the
F628 setting.
A user-selected contact may be actuated if so configured.
If Disabled the ASD will stop and not trip; the FL contact is not activated.
Settings:
0 — Disabled
1 — Enabled
Direct Access Number — F627
Parameter Type — Selection List
Factory Default — Disabled
Changeable During Run — No
F622 F627