Fuji Electric FRENIC-HVAC User Manual page 476

 Overload prevention control -- OLP
(E20 to E24 and E27, data = 36)
This output signal comes ON when the overload prevention control is activated and the
output frequency changed.
In equipment where a decrease in the output frequency does not lead to a decrease in
the load, the overload prevention control is of no use and should not be enabled.
H71 Deceleration Characteristics
Setting the H71 data to "1" enables forced brake control. If regenerative energy produced
during the deceleration of the motor and returned to the inverter exceeds the inverter's
braking capability, an overvoltage trip will occur. The forced brake control increases the
motor energy loss during deceleration, increasing the deceleration torque.
Data for H71
0
1
This function is aimed at controlling the torque during deceleration; it has no effect
if there is a braking load.
Enabling the automatic deceleration (anti-regenerative control, H69 = 2 or 4) in the
torque limit control mode disables the deceleration characteristics specified by H71.
H72 Main Power Down Detection (Mode selection)
H72 monitors the inverter alternate-current input power source, and disables the inverter
operation if it is not established.
Data for H72
0
1
In cases where the power is supplied via a PWM converter or the inverter is connected via the
DC link bus, there is no alternate-current input. In such cases, set H72 data to "0," otherwise
the inverter cannot operate.
If you use a single-phase power supply, contact your Fuji Electric representative.
H76 Torque Limiter for Braking (Frequency increment limit)
For details, refer to the description of H69.
Disable
Enable
Disable
Enable
6-166
Function
Function
(Refer to H69.)