Mitsubishi Electric FR-A700 Technical Manual page 250

(1) Torque limit block diagram
<Vector control>
Speed command +
(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.
Setting
[Pr. ]
Range
Internal torque limit
Parameter-set torque limit operation is
performed.
0
(initial value)
Changing the torque limit parameter
value by communication enables torque
810
limit to be input by communication.
External torque limit
Torque limit using the analog voltage
1
(current) input to any of terminal 1,
terminal 4 or terminal 6 (FR-A7AZ) is
enabled.
(3) Torque limit level by parameter setting
[Pr. 810 = 0, Pr. 22, 812 to 814]
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.
Torque limit
+
Reverse
regeneration
Reverse
quad4
rotation
[Pr.814]
quad3
[Pr.813]
Reverse
driving
Rated speed
Speed control
-
Torque limit input method
Forward
driving
Forward
quad1
rotation
[Pr. 22]
Speed
quad2
[Pr.812]
Forward
regeneration
-
Torque limit
(4) Torque limit
(terminal 1, 4, 6 (FR-A7AZ)) [Pr.810=1, Pr.
406*, 858, 868]
(* Pr. 406 is available only when FR-A7AZ
is installed)
Upper limit of torque limit is [Pr. 22], and torque limit
value is the analog input to terminal 1, terminal 4 or
terminal 6.
When torque limit value is input to terminal 1, set [Pr.
868 Terminal 1 function assignment = 4]. When torque
limit value is input to terminal 4, set [Pr. 858 Terminal 4
function assignment = 4]. Set [Pr. 406 High resolution
analog input selection = 4] to input torque limit value to
terminal 6 of FR-A7AZ. (Refer to page 46 for details
of function assignment of analog input terminal.)
When [Pr. 858 = 4] and [Pr. 868 = 4], terminal 1 serves
as torque limit input and terminal 4 as without
function. When [Pr. 858 = 4] and [Pr. 868 = 4] while [Pr.
406 = 4], terminal 6 is the torque limit input, and
terminal 1 and terminal 4 do not have a function.
Reverse
regeneration
Analog input or internal
torque control (Pr. 22 etc.)
whichever is smaller
Reverse rotation
Speed
Analog input or internal
torque control (Pr. 22 etc.)
whichever is smaller
Reverse
driving
When [Pr. 858 = 4] and [Pr. 868 = 2], torque is limited
by analog input to terminal 1 for regeneration and by
terminal 4 for driving. If the setting of [Pr. 406] is same
with [Pr. 858] or [Pr. 868], function of terminal 6 is
valid, and terminal 1 or terminal 4 does not have a
function.
284
PARAMETER
Iq current control
IM
Encoder
level by analog
Torque limit
Analog input or internal
torque control (Pr. 22 etc.)
quad4 quad1
whichever is smaller
Forward rotation
Analog input or internal
quad3
quad2
torque control (Pr. 22 etc.)
whichever is smaller
Rated speed
input
Forward
driving
Speed
Forward
regeneration