162
WX9 ASD Installation and Operation Manual
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
).
Note:
This feature may increase deceleration times.
Direct Access Number — F626
Parameter Type —
Numerical
Factory Default —
(ASD-Dependent)
Changeable During Run —
Yes
Minimum — 50.0
Maximum — 250.0
Units — %
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
(
) 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
Direct Access Number — F627
Parameter Type —
Selection List
Factory Default —
Disabled
Changeable During Run —
No
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
Direct Access Number — F628
Parameter Type —
Numerical
Factory Default —
0.03
Changeable During Run —
No
Minimum — 0.00
Maximum — 10.00
Units — Seconds
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
(
Ridethrough Mode
)
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
information on this parameter.
Note:
This feature may decrease deceleration times.
Direct Access Number — F629
Parameter Type —
Numerical
Factory Default —
(ASD-Dependent)
Changeable During Run —
Yes
Minimum — 50.00
Maximum — 100.0
Units — %
Summary of Contents for WX9 ASD
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