58
The output terminal to which output terminal function 30 (or 31) is assigned can be used
to indicate any type of the fault in the inverter even if during the period of retry.
NO. Parameter Name Setting Range
f401
Electronic-thermal protection characteristic
selection
0~7 2
Table 2.6 Description of f401
f401 motor type overload tripped enable
NO YES
Overload stall: This is an optimum function for equipment such as fans, pumps and
blowers with variable torque characteristics that the load current decreases as the
operating speed decreases. When the inverter detects an overload, this function
automatically lowers the output frequency before the motor overload trip e-21 is
activated. This function operates a motor at frequencies that allow the load current to
keep its balance so that the inverter can continue operation without being tripped.
Note: Do not use the overload stall function with loads having constant torque
characteristics (such as conveyor belts in which load current is fixed with no relation to
speed).
NO. Parameter Name Setting Range Default
f402 Motor 150%-overload time limit 10~2400s 300
Parameter f402 is used to set the time elapsed before the motor trips under a load of
150% (overload trip e-22) within a range of 10 to 2400 seconds.
NO. Parameter Name Setting Range
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General