176
Q9 Plus ASD Installation and Operation Manual
Output Phase Loss Detection
Program
Protection
Phase Loss
This parameter
Enables/Disables
the monitoring of each phase of the 3-phase
output signal (U, V, or W) of the ASD. If either line is missing, inactive, or not
of the specified level for one second or more, the ASD incurs a trip.
Note:
Autotune checks for phase failures regardless of this setting.
Settings:
0 — (Disabled) No Detection
1 — (Enabled) First Running Only at Startup After Power On and Retry
2 — (Enabled) Running Only at Start Up and Retry
3 — (Enabled) During Run
4 — (Enabled) At Starting and During Run
5 — (Enabled) Auto-Restart When Cut on Drive Output
Direct Access Number — F605
Parameter Type —
Selection List
Factory Default —
No Detection
Changeable During Run —
No
Overload Reduction Starting Frequency
Program
Protection
Overload
This parameter is primarily used with V/f motors. It is used to reduce the
starting frequency at which the
Overload Reduction
function begins and is
useful during extremely low-speed motor operation.
During very low-speed operation the cooling efficiency of the motor decreases.
Lowering the start frequency of the
Overload Reduction
function aides in
minimizing the generated heat and precluding an
Overload
trip.
This function is useful in loads such as fans, pumps, and blowers that have the
square reduction torque characteristic.
The default overload time is 300 seconds at 150% ASD output; this time may
vary as a function of the magnitude of the overload.
Direct Access Number — F606
Parameter Type —
Numerical
Factory Default —
(ASD-Dependent)
Changeable During Run —
Yes
Minimum — 0.00
Maximum — (ASD-Dependent)
Units — Hz
Input Phase Loss Detection
Program
Protection
Phase Loss
This parameter enables the 3-phase input power phase loss detection feature. A
loss of either input phase (R, S, or T) results in a trip.
Settings:
0 — Disabled
1 — Enabled
Direct Access Number — F608
Parameter Type —
Selection List
Factory Default —
Enabled
Changeable During Run —
No
Low-Current Detection Current Hysteresis Width
Program
Protection
Low-Current Settings
During a momentary low-current condition, this parameter provides a current
threshold level to which the low-current condition must return within the time
setting of
F612
or a
Low-Current Trip
will be incurred.
Direct Access Number — F609
Parameter Type —
Numerical
Factory Default —
10
Changeable During Run —
Yes
Minimum — 1
Maximum — 20
Units — %
F605
F609
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