Toshiba Q9 Series, Installation And Operation Manual, Page: 133 / 233

Q9 ASD Installation and Operation Manual 123
Stall Prevention Factor 1
No Path — Direct Access Only
This parameter is to be adjusted in the event that the motor stalls when operated
above the base frequency.
If a momentary heavy-load condition occurs the motor may stall before the load
current reaches the stall prevention level setting of
F601 .
A drop in the supply voltage may cause fluctuations of the load current or may
cause motor vibration. A gradual adjustment of this parameter may alleviate this
condition.
Start with a setting of 85 at these parameters and gradually adjust them from there
one at a time until the desired results are produced.
Adjustments to this parameter may increase the load current of the motor and
subsequently warrant an adjustment at the Motor Overload Protection Level
setting.
Direct Access Number — F416
Parameter Type — Numerical
Factory Default — 100
Changeable During Run — No
Minimum — 10
Maximum — 250
Power Running Torque Limit
No Path — Direct Access Only
This parameter determines the source of the control signal for the positive torque
limit setting.
If F441 is selected, the value set at F441 is used as the Power Running Torque
Limit input.
Settings:
1 — V/I
2 — RR
3 — RX
4 —
F441 (Setting)
Direct Access Number — F440
Parameter Type — Selection List
Factory Default — F441 Setting
Changeable During Run — Yes
Power Running Torque Limit Level
No Path — Direct Access Only
This parameter provides a value for the Power Running Torque Limit setting if
Setting is selected at parameter
F440 .
This value provides the positive torque upper-limit for the number 1 motor.
Set this parameter to 250% to disable this function.
Direct Access Number — F441
Parameter Type — Numerical
Factory Default — 250.0 (Disabled)
Changeable During Run — Yes
Minimum — 0.00
Maximum — 250.0 (Disabled)
Units — %
Regenerative Braking Torque Limit
No Path — Direct Access Only
This parameter determines the source of the Regenerative Torque Limit control
signal.
If F443 is selected, the value set at F443 is used for this parameter setting.
Settings:
1 — V/I
2 — RR
3 — RX
4 —
F443 (Setting)
Direct Access Number — F442
Parameter Type — Selection List
Factory Default — F443 Setting
Changeable During Run — Yes
F416 F442