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F626
Over-Voltage Limit Operation 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 more than 4 mS, an Over-Voltage
Trip will be incurred.
This parameter is enabled at Over-Voltage Limit Operation (F305).
Note:
This feature may increase deceleration times.
Under-Voltage Trip Selection
Program Protection Under-Voltage/Ridethrough
This parameter Enables/Disables the Under-Voltage Trip function.
With this parameter Enabled, the ASD will trip if the under-voltage condition
persists for a time greater than the Under-Voltage (Trip Alarm) Detection
Time (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
Under-Voltage (trip alarm) Detection Time
Program Protection Under-Voltage/Ridethrough
This parameter sets the time that the under-voltage condition must exist to
cause an Under-Voltage trip when this function is enabled at F627.
Regenerative Power Ridethrough Control Level
Program Protection Under-Voltage/Ridethrough
This parameter sets the low end of the DC bus voltage threshold. Once the DC
bus voltage drops below this setting, the setting of
will be activated. 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.
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 Regenerative Power Ridethrough Selection (F302) for additional
information on this parameter.
Note:
This feature may decrease deceleration times.
162
F302
(Ridethrough Mode)
Direct Access Number — F626
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — 50.0
Maximum — 250.0
Units — %
Direct Access Number — F627
Parameter Type — Selection List
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 — (ASD-Dependent)
Changeable During Run — Yes
Minimum — 50.00
Maximum — 100.0
Units — %
WX9 ASD Installation and Operation Manual
F629
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