G7 ASD Operation Manual 65
Motor #1 Torque Boost
Program ⇒ Fundamental Parameters ⇒ Motor Set #1
The Motor #1 Torque Boost function is used to increase the low frequency
torque for high-inertia loads by increasing the output voltage at frequencies
below ½ of the #1 Base Frequency (F014) setting.
The value programmed as a boost percentage establishes an output voltage vs.
output frequency relationship to be used to start the motor or to provide
smoother operation.
Note: Setting an excessive Torque Boost level may cause nuisance
tripping and mechanical stress to loads.
Direct Access Number — F016
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — Yes
Minimum — 0.0
Maximum — 30.0
Units — %
Soft Stall
Program ⇒ Protection Parameters ⇒ 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 Pro tection #1
setting (F600); thus, reducing the output current.
If the current drops below the mo tor overload protection lev e l se tti ng w ith i n a
specified time, the ou tput of the ASD will accelerate to the pro grammed
frequency setpoint. If not, a trip will be incurred.
The Soft Stall feature is avai lable when the (Program ⇒ Protection Param eters
⇒ Overload ⇒) Motor Overload Tr ip Enable/Disable parameter is enabled
only.
Soft Stall is highly effective in preventi ng motor overload tr ips when used on
fans, blowers, pumps, and other centrifugal loads which require less torque at
lower frequencies.
Note: The Soft Stall setting may affect acceler ation times and patterns.
Settings:
Disabled
Enabled (box checked)
Direct Access Number — F017
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — No
F016 F017