Mitsubishi Electric FR-A700 Instruction Manual page 574

Frequency/torque setting by analog input (terminals 1, 2 and 4)
Change the frequency at maximum analog input [C18 (Pr. 920), C40 (Pr. 933)]
To change the torque setting (gain) of the maximum analog input voltage (current), set a value
to C18 (Pr. 920) or C40 (Pr. 933).
Analog input bias/gain calibration [C16 (Pr. 919) to C19 (Pr. 920), C38 (Pr. 932) to C41 (Pr.
933)]
The "bias" and "gain" functions are used to adjust the relationship between the input signal
entered from outside the inverter to set the torque command and torque limit, e.g. 0 to 5V, 0 to
10V or 4 to 20mADC, and the torque.
Set the bias torque of terminal 1 input in C16 (Pr. 919). (It is factory-set to the torque at 0V)
Parameter C17 (Pr. 919) is the bias for the input signal at terminal 1, i.e. the minimum value of
the analog signal. When signals are smaller than this value the frequency set point signal will be
limited to the value set with C16.
Set the torque in C18 (Pr. 920) for the torque command voltage set with Pr. 73 Analog input
selection. (initial value is 150%)
Parameter C19 (Pr. 920) sets the gain for the input signal on terminal 1, i.e. the maximum value
of the analog signal connected to terminal 1. When signals exceed this value the frequency set
point value is limited to the value stored in C18.
Set the bias torque of terminal 4 input in C38 (Pr. 932). (It is factory-set to the torque at 4mA)
Parameter C39 (Pr. 932) sets the bias of the input signal on terminal 4, i.e. the minimum value
of the analog signal connected to terminal 4. When the signal on this terminal is lower than this
value the frequency set point value is limited to the value set with C38. (This parameter is set to
a default value of 20% at the factory, which corresponds to approx. 4mA.)
Set the torque in C40 (Pr. 933) for 20mA of the torque command current (4 to 20mA).
Parameter C41 (Pr. 933) sets the gain of the input signal on terminal 4, i.e. the maximum value
of the analog signal connected to terminal 4. When the signal on this terminal is higher than this
value the frequency set point value is limited to the value set with Pr. C40.
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Parameter