Fuji Electric FRENIC-HVAC User Manual page 434

E80, E81 Low Torque Detection (Level and Timer)
E80 and E81 specify the operation level and the timer for the output signal U-TL,
respectively.
Output signal
U-TL
Low output torque detected -- U-TL

This output signal comes ON when the torque value calculated by the inverter or torque
command drops below the level specified by E80 (Low torque detection (Level)) for the
period specified by E81 (Low torque detection (Timer)). The signal turns OFF when the
calculated torque exceeds "the level specified by E80 plus 5% of the motor rated torque." The
minimum ON-duration is 100 ms.
In the inverter's low frequency operation, as a substantial error in torque calculation occurs,
no low torque can be detected within the operation range at less than 20% of the base
frequency (F04). (In this case, the result of recognition before entering this operation range is
retained.)
The U-TL signal goes off when the inverter is stopped.
Since the motor parameters are used in the calculation of torque, it is recommended that
auto-tuning be applied by function code P04 to achieve higher accuracy.
E98, E99 Terminal [FWD] Function
Terminal [REV] Function
For details about the configuration of terminals [FWD] and [REV], refer to the descriptions
of E01 to E07.
When [FWD] or [REV] is ON, it is not possible to change the E98 or E99 data, respectively.
Operation level
Assigned data
Range: 0 to 150%
45
6-124
Range: 0.01 to 600.00 s
E80
(
Refer to E01 to E07.)
Timer
E81