78 HX7+ ASD Installation and Operation Manual
Soft Stall
Program Protection Overload
This parameter Enables/Disables the Soft Stall function. When enabled, the
Soft Stall function reduces the output frequency of the ASD when the current
requirements of the motor exceed the Electronic Thermal Protection #1
setting (
F600); thus, reducing the output current.
If the current drops below the level setting within a specified time, the output of
the ASD will accelerate to the programmed frequency setpoint. If not, a trip
will be incurred.
The Soft Stall feature is available when the (Program Protection
Overload)
Motor Overload Trip (check box) parameter is enabled only.
Soft Stall is highly effective in preventing motor overload trips when used on
fans, blowers, pumps, and other centrifugal loads which require less torque at
lower frequencies.
Note: The Soft Stall setting may affect acceleration times and patterns.
Settings:
0 — Disabled
1 — Enabled (check box to enable)
Direct Access Number — F017
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — No
F017 F017
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