Mitsubishi Electric 800 Series Instruction Manual page 158

Speed control under Real sensorless vector control, vector control, PM sensorless vector
Torque limit level using analog input (terminals 1, 4) (Pr.810 = "1", Pr.858,
Pr.868)
• The torque is limited with the analog input of terminal 1 or terminal 4. (External torque limit)
• Torque limit using analog input is valid with a limit value lower than the internal torque limit (Pr.22, Pr.812 to Pr.814). (If the
torque limit using analog input exceeds the internal torque limit, the internal torque limit is valid.)
• When inputting the torque limit value from terminal 1, set Pr.868 Terminal 1 function assignment="4". When
inputting from terminal 4, set Terminal 4 function assignment="4".
• When Pr.858="4" and Pr.868="2", the torque for regenerative driving is limited with the terminal 1 analog input, and the
torque for power driving is limited with the terminal 4 analog input.
Torque limit
Reverse
regeneration
quad4
Reverse
∗ (Pr. 814)
rotation
quad3
∗
(Pr. 813)
Reverse
driving
-
Rated speed
∗ Analog input (terminal 1, 4) or internal torque control (Pr. 22 etc.) whichever is smaller
• The torque limit using analog input can be corrected with Calibration parameters Pr.919, Pr.920, Pr.932, and Pr.933.
(Refer to page 407.)
400
150
Bias
Pr.919
0
0 Torque setting signal
0
Pr.919
Calibration example of terminal 1
NOTE
• When inputting an analog signal to the terminal 1, input a positive voltage (0 V to +10 V (+5 V)).
When a negative voltage (0 V to -10 V (-5 V)) is input, the torque limit value set by the analog signal becomes "0".
Forward
driving
quad1
Forward
∗
(Pr. 22)
rotation
Speed
quad2
∗
(Pr. 812)
Forward
regeneration
Gain
Pr.920
Initial
value
100%
5V
10V
Pr.920
Torque limit
Reverse
regeneration
Terminal 4 input or
internal torque limit
whichever is smaller
quad4
Reverse rotation
Speed
quad3
Terminal 4 input or
internal torque limit
whichever is smaller
Reverse
driving
-
Rated speed
When Pr. 858=4, Pr. 868=2
400
150
Bias
Initial
Pr.932
value
0 20
0 4
Torque setting signal
Pr.932
Calibration example of terminal 4
control
Forward
driving
Terminal 4 input or
internal torque limit
whichever is smaller
quad1
Forward rotation
Terminal 4 input or
quad2
internal torque limit
whichever is smaller
Forward
regeneration
Gain
Pr.933
100%
20mA
Pr.933
157
PARAMETERS
5