Mitsubishi Electric FR-A820-00046 Instruction Manual page 246

Control method
● Functions of the terminal 4 under different control modes
Pr. 858
setting
0
(initial
value)
1
4
9999
Tab. 5-23:
Real sensorless vector control (Pr. 800 = "12"), vector control (Pr. 800 = "2")
Vector control (Pr. 800 = "4"), PM sensorless vector control (Pr. 800 = "14")
Vector control (Pr. 800 = "5")
Enabled under vector control
Disabled when Pr. 868="1".
Disabled when Pr. 868="4".
⎯
: No function
NOTES Switching between the speed control and the torque control is always enabled regardless of the
motor status: in a stop, in running, or in DC injection brake (during pre-excitation).
During operation, switching between speed control and position control or between torque con-
trol and position control occurs when the output frequency reaches Pr. 865 "Low speed detection"
or lower with no position command provided.
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. 178 to Pr. 189
Pr. 450
Pr. 804
Pr. 807
Pr. 810
Pr. 858
Pr. 868
5 - 66
Speed control/torque control
switchover
Speed control Torque control
(MC signal-OFF) (MC signal-ON)
Speed command Speed limit
(AU signal-ON) (AU signal-ON)
Magnetic flux Magnetic flux
command command
Torque limit
⎯
(Pr. 810 = 1)
⎯ ⎯
Functions of the terminal 4 under different control modes
(input terminal function selection)
Second applied motor
Torque command source selection
Speed limit selection
Torque limit input method selection
Terminal 4 function assignment
Terminal 1 function assignment
Speed control/position control
switchover
Speed control Position control
(MC signal-OFF) (MC signal-ON)
Speed command
⎯
(AU signal-ON)
Magnetic flux Magnetic flux
command command
Torque limit Torque limit
(Pr. 810 = 1) (Pr. 810 = 1)
⎯ ⎯
Parameters
Position control/torque control
switchover
Position control Torque control
(MC signal-OFF) (MC signal-ON)
Speed limit
⎯
(AU signal-ON)
Magnetic flux Magnetic flux
command command
Torque limit
⎯
(Pr. 810 = 1)
⎯ ⎯
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