YASKAWA Varispeed V7 Instruction Manual page 202

Undertorque Detection Level (n118)
Sets the undertorque detection current level in units of 1 %. (Inverter
rated current=100 %) When detected by torque is selected, motor rated
torque becomes 100 %.
Factory setting=10 %
Undertorque Detection Time (n119)
If the time for which the motor current is less than the undertorque
detection level (n118) is longer than the undertorque detection time
(n119), the undertorque detection function operates.
Factory setting=0.1 s
Overtorque/Undertorque Detection Function Selection 2
(n097)
When vector control mode is selected, it is possible to select whether
overtorque/undertorque detection is performed by output current or out-
put torque.
When V/f control mode is selected, the n097 setting becomes invalid,
and overtorque/undertorque is detected by output current.
Setting
0 Overtorque/undertorque detected by output torque.
1 Overtorque/undertorque detected by output current.
7. Programming Features
Description
201