Справочник Пользователя для Mitsubishi Electronics FR-A700

vector control, vector control

(2) Selection of torque limit input method (Pr. 810) 

⋅ Set Pr. 810 Torque limit input method selection to select the method to limit output torque during speed control.

Torque limit by parameter setting is initially set.

(3) Torque limit level by parameter setting (Pr. 810 = "0"

, 

Pr. 812 to Pr. 814 ) 

(4) Torque limit level by analog input (terminal 1, 4) (Pr. 810 = "1", Pr. 858, Pr. 868 ) 

810

0 (initial 

value)

Internal torque limit

Parameter-set torque limit operation is performed.
Changing the torque limit parameter value by communication enables torque limit 
to be input by communication. 

1

External torque limit Torque limit using analog voltage (current) to terminal 1 or terminal 4 is enabled. 

⋅ With the initial value, limit is made ON all quadrants on the

Pr.  22 Stall prevention operation level (torque limit level) .

⋅ When you want to set the level on a quadrant basis, set the

torque limit level in Pr. 812 Torque limit level (regeneration), Pr.
813 Torque limit level (3rd quadrant), Pr. 814 Torque limit level
(4th quadrant).
When "9999" is set, Pr. 22 is the torque limit level.

⋅ With the upper limit of torque limit as set in Pr. 22, the analog input from terminal 1 input is used as the torque limit

value within the Pr. 22 setting range.

⋅ When torque limit value is input to terminal 1, set "4" in Pr. 868 Terminal 1 function assignment. When torque limit value

is input from terminal 4, set "4" in Pr. 858 Terminal 4 function assignment.

⋅ When Pr. 858="4" and Pr. 868="2," torque is limited by analog input to terminal 1 for regeneration and to terminal 4 for

driving. 

⋅ Torque limit by analog input can be calibrated using calibration parameter C16 (Pr. 919) to C19 (Pr. 920), C38 (Pr. 932) to

C41 (Pr. 933) . (Refer to page 300)

*

Analog input (terminal 1, 4) or internal torque control (Pr. 22 etc.) whichever is smaller

Torque limit

<Vector control>

 

Speed control

 

Speed command +

-

 

Iq current control

 

IM

 

Encoder

quad1

quad4

quad2

Reverse 

rotation

Forward 

rotation

Torque limit

Speed

Reverse 

driving

Reverse 

regeneration

Rated speed

quad3

+

-

Forward 

regeneration

Forward 

driving

quad1

quad4

quad2

Reverse 

rotation

Forward 

rotation

Torque limit

Speed

Reverse 

driving

Reverse 

regeneration

Rated speed

quad3

+

-

Forward 

regeneration

Forward 

driving

When Pr.858=4, Pr.868=2

quad1

quad4

quad2

Reverse rotation

Forward rotation

Torque limit

Rated speed

+

-

Terminal 1 input or 
internal torque limit
(Pr.22 etc.) whichever
is smaller

Speed

quad3

Reverse 

regeneration

Reverse 

driving

Forward 

driving

Forward 

regeneration

Terminal 4 input or 
internal torque limit
(Pr.22 etc.) whichever
is smaller

Terminal 4 input or 
internal torque limit
(Pr.22 etc.) whichever
is smaller

Terminal 1 input or 
internal torque limit
(Pr.22 etc.) whichever
is smaller