Mitsubishi Electric 800 Series Instruction Manual page 122

NOTE
• For the details of the CC-Link communication, refer to the FR-A8NC E kit Instruction Manual. For the details of the CC-Link IE
TSN or CC-Link IE Field Network, refer to the Instruction Manual (Communication). For the details of the PROFIBUS-DP
communication, refer to the FR-A8NP E kit Instruction Manual.
• For details of the setting using the PLC function, refer to the PLC Function Programming Manual.
 Torque command given by 16-bit digital input (Pr.804 = "4")
• Give the torque command by 12-bit or 16-bit digital input using the FR-A8AX (plug-in option).
NOTE
• For details of the setting using the FR-A8AX, refer to the FR-A8AX E kit Instruction Manual.
 Changing the torque characteristic of the constant-power range (Pr.801,
Pr.803)
• According to the motor's characteristics, the torque decreases at the frequency equal to or higher than the base frequency.
To give the constant torque command at the speed equal to or higher than the base frequency, set "1" in Pr.803 Constant
output range torque characteristic selection.
• Torque in a low-speed range is constant during torque control regardless of the setting of Pr.803. However, when "2" is
set in Pr.803 under Real sensorless vector control, the torque may not be kept constant in the low-speed range due to a
condition such as the Pr.801 setting.
Pr.803 setting
0 (initial value), 10 Constant motor output
1 Constant torque
2 Constant torque
• To avoid overload or overcurrent of the inverter or motor, use Pr.801 Output limit level to limit the torque current in the
constant power range.
Pr.801 setting
0% to 400% Set the torque current limit level.
9999 The torque limit setting value (Pr.22, Pr.812 to Pr.817, etc.) is used for limiting the torque current.
Pr.803=0, 1, 10
Torque
Constant torque range
Pr.803 = 2
Torque
Constant torque range
Pr.801
Parameters referred to
Pr.858 Terminal 4 function assignmentpage 279
Calibration parameter C38 (Pr.932) to C41 (Pr.933) (terminal 4 bias, gain
Torque characteristic in constant-power range
Torque characteristic
—
Unlimited
Limited
Constant power range
Pr.803=1:
constant torque command
Pr.803=0, 10:
constant power command
Rated speed
Speed
Constant power range
Torque reduction
when the output is
limited
When the output limit
Constant torque is not exceeded
command
Rated speed
Speed
Output limit
Description
torque)page 287
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6. Torque Control
6.3 Torque command