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Direct Access Parameter Information
Q9 Plus ASD Install/Op Manual
Stall Prevention Control Switching
Program Feedback PG Settings
While running or during deceleration, the Over-Voltage Stall func-
tion may be controlled by either of two profile settings as selected
at this parameter.
The first profile (Stall Prevention Control 1) increases the output
frequency at a maximum of 5 Hz intervals (quick response) in
response to the over-voltage condition.
The second profile (Stall Prevention Control 2) increases the out-
put frequency at an interval of 0.5 Hz maximum in response to
the over-voltage condition.
Settings:
0 — Stall Prevention Control 1
1 — Stall Prevention Control 2
Direct Access Number —
F468
Parameter Type — Selection List
Factory Default — Stall Preven-
tion Control 1
Changeable During Run — No
Over-Voltage Limit (Time) Constant
Program Protection Stall
This parameter is used in conjunction with parameters F305
(Over-Voltage Limit Operation) and F626 (Over-Voltage Limit
Operation Level) to set a running window of time. The window of
time is used to create an average value to be used in calculating
the DC bus voltage upper threshold value that, once exceeded,
will cause an Over-Voltage Stall.
While running or during deceleration, the Over-Voltage Stall func-
tion increases the output frequency of the ASD for a specified
time in an attempt to prevent an Over-Voltage Trip.
If the over-voltage threshold level setting of parameter F626 is
exceeded for over 4 mS, an Over-Voltage Trip will be incurred.
Select zero (0) for automatic value selection for this parameter.
Note: This parameter setting may increase deceleration times.
Note: Over-voltage alarms will display OP to convey Over-
Potential.
Direct Access Number —
F469
Parameter Type — Numerical
Factory Default — 0
Changeable During Run — No
Minimum — 0
Maximum — 1000
F468 – F470
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