Mitsubishi FR-A740-00023-EC, Инструкция по эксплуатации

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95
Speed control by real sensorless vector
control, vector control
4
P
ARAME
T
E
R
S
(1) Torque limit block diagram
(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 )
Parameter
Number
Setting Range
Torque Limit Input
Method
Description
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 the analog voltage (current) from terminal 1 or
terminal 4 is made valid.
⋅
In the initial setting, 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 from 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 limitted by analog input from terminal 1 for regeneration and by 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 288)
* Analog input (terminal 1, 4) or internal torque control ( Pr. 22 etc.) whichever is smaller
Torque limit
<Vector control>
Speed control
Speed c
-
Iq current control
IM
Encoder
quad1
( Pr. 22)
quad4
( Pr. 814)
( Pr. 813)
quad2
( Pr. 812)
Reverse
rotation
Forward
rotation
Torque limit
Speed
Reverse
driving
Reverse
regeneration
Rated speed
quad3
+
-
Forward
regeneration
Forward
driving
*
*
*
*
quad1
( Pr. 22)
quad4
( Pr. 814)
( Pr. 813)
quad2
( Pr. 812)
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