Mitsubishi Electric FR-A820-00046 Instruction Manual page 325

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Torque bias operation (Pr. 844, Pr. 845)
● The torque start-up can be made slower by setting Pr. 844 "Torque bias filter" ≠ "9999". The torque
start-up operation at this time is the time constant of the primary delay filter.
● Set the time for continuing the output torque simply by using the command value for the torque
bias in Pr. 845 "Torque bias operation time".
When pre-excitation is not performed, the torque bias functions at the same time as the start signal.
Fig. 5-32:
NOTES When torque bias is enabled and Pr. 868 = "6", terminal 1 operates as a torque command instead
of a frequency setting auxiliary. When override compensation is selected using Pr. 73 "Analog
input selection" and terminal 1 is the main speed, no main speed (main speed = (0 Hz) is set.
The torque bias is valid for the first motor. When applying the second motor (RT signal is ON), the
torque bias function is not performed.
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. 73
Pr. 178 to Pr. 189
C16 to C19
(Pr. 919, Pr. 920)
FR-A800
Speed
Torque bias
Torque bias filter primary
delay time constant
Output torque
Time when torque is generated by
torque bias setting
Pre-excitation LX
Start signal
Torque output
Analog input selection
(input terminal function selection)
(torque setting voltage (current) bias/gain)
Pr. 844
Pr. 845
I001517E
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