HX7+ ASD Installation and Operation Manual 173
Over-Voltage Stall Level
Program Protection Stall
This parameter sets the upper DC bus voltage threshold that, once exceeded,
will cause an Over-Voltage Stall. An Over-Voltage Stall increases the output
frequency of the drive during deceleration for a specified time in an attempt to
prevent an Over-Voltage Trip.
If the over-voltage condition persists for over 4 mS, an Over-Voltage Trip will
be incurred.
Note: This feature may increase deceleration times.
Direct Access Number — F626
Parameter Type — Numerical
Factory Default — (ASD dependent)
Changeable During Run — Ye s
Minimum — 50.0
Maximum — 250.0
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 active.
Settings:
0 — Disabled
1 — Enabled (box checked)
Direct Access Number — F627
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — No
Undervoltage Detection Time
Program Protection Undervoltage/Ridethrough
This parameter sets the time that the undervoltage condition must exist to cause
an Undervoltage trip when this function is enabled at
F627.
Direct Access Number — F628
Parameter Type — Numerical
Factory Default — 0.03
Changeable During Run — No
Minimum — 0.00
Maximum — 10.00
Units — Seconds
Undervoltage Stall level
Program Protection Undervoltage/Ridethrough
This parameter sets the low end of the DC bus voltage threshold that, once it
drops below this setting, will activate the setting of
F302 (Ridethrough Mode).
Activation may be the result of a momentary power loss or an excessive load on
the bus voltage. Once activated, the system will attempt to maintain the bus
voltage level set here until the motor stops.
Note: This feature may decrease deceleration times.
Direct Access Number — F629
Parameter Type — Numerical
Factory Default — (ASD dependent)
Changeable During Run — Ye s
Minimum — 50.00
Maximum — 100.0
Units — %
F626 F629
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