Toshiba Q9+ Installation & Operation Manual page 151

Over-Voltage Limit Operation (Stall)
Program Protection Stall
This parameter enables the Over-Voltage Limit function. This fea-
ture, in conjunction with the setting of F626, is used to set the
upper DC bus voltage threshold 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
exceeded for over 4 mS, an Over-Voltage Trip will be incurred.
The effects of this parameter may be further enhanced by the
setting of F468.
Note: This parameter setting may increase deceleration times.
Note: Over-voltage alarms will display OP to convey Over
Potential.
Settings:
0 — On (OP Stall)
1 — Off
2 — On (Quick Deceleration)
3 — On (Dynamic Quick Deceleration — NOT USED)
Supply Voltage Correction
Program Protection Base Frequency Voltage
This parameter Enables/Disables the Voltage Compensation
function.
When Enabled, this function provides a constant V/f ratio during
periods of input voltage fluctuations.
Settings:
0 — Disabled (Output Voltage Unlimited)
1 — Enabled (Supply Voltage Compensation)
2 — Disabled (Output Voltage Limited)
3 — Enabled (Supply Voltage Compensation w/Output Voltage
Limited)
Dynamic Braking Resistance (not used)
Program Protection Dynamic Braking
This parameter is used to input the resistive value of the Dynamic
Braking Resistor being used.
Light-duty and heavy-duty resistors vary from a few ohms to sev-
eral hundred ohms. The appropriate resistance size will be type-
form- and application-specific.
Note: Using a resistor value that is too low may result in system
damage.
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F305
Direct Access Parameter Information
Q9 Plus ASD Install/Op Manual
F309
Direct Access Number —
Parameter Type — Selection List
Factory Default — ON (Quick
Deceleration)
Changeable During Run — No
F626 is
Direct Access Number —
Parameter Type — Selection List
Factory Default — (ASD-Depen-
dent)
Changeable During Run — No
Direct Access Number —
Parameter Type — Numerical
Factory Default — (ASD-Depen-
dent)
Changeable During Run — No
Minimum — 0.5
Maximum — 1000.0
Units — 
F305
F307
F308
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