Mitsubishi Electric FR-A720-0.4K Instruction Manual page 158

(2) Set multiple torque boost (RT signal, X9 signal, Pr. 46, Pr. 112)
⋅ Use the second (third) torque boost when changing the torque boost according to application or when using
multiple motors by switching between them by one inverter.
⋅ Pr. 46 Second torque boost is valid when the RT signal turns ON.
⋅ Pr. 112 Third torque boost is valid when the X9 signal is ON. For the terminal used for X9 signal input, set "9" in any
of Pr. 178 to Pr. 189 (input terminal function selection) to assign the X9 signal function.
REMARKS
⋅ The RT(X9) signal acts as the second
(Refer to page 235)
⋅ The RT signal is assigned to the RT terminal in the default setting. By setting "3" in any of Pr. 178 to Pr. 189 (input terminal function
selection), you can assign the RT signal to the other terminal.
CAUTION
⋅ Increase the setting when the distance between the inverter and motor is long or when motor torque is insufficient in the low-
speed range. If the setting is too large, an overcurrent trip may occur.
⋅ The Pr. 0, Pr. 46, Pr. 112 settings are valid only when V/F control is selected.
⋅ When using the inverter dedicated motor (constant torque motor) with the 5.5K or 7.5K, set the torque boost value to 2%. If the
initial set Pr. 71 value is changed to the setting for use with a constant-torque motor, the Pr. 0 setting changes to the
corresponding value in above.
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 3 Base frequency, Pr. 19 Base frequency voltage
Pr. 71 Applied motor Refer to page 187
Pr. 178 to Pr. 189 (Input terminal function selection)
(third)
function selection signal and makes the other second
Refer to page 159
Refer to page 231
Adjustment of the output torque
(current) of the motor
(third)
functions valid.
4
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