Filter
Top Products
87
Operation selection functions 1 (Pr. 17 to Pr. 37)
PARAMETERS
3
3.5.2 Torque limit (Pr. 22 , Pr. 803 , Pr. 810 to
Pr. 817 )
<Details>
Torque limit is activated so that the output torque does not exceed the predetermined value during speed control.
The block diagram is shown below. The output of speed control is suppressed within the torque limit value.
At this time, set Pr. 810 to select the way to make torque limit.
Used to restrict the output torque to the predetermined value during speed control.
For details of the setting method, refer to tlimithe torque limit of the Instruction Manual (basic).
Parameter Name Factory Setting
Setting
Range
Remarks
22 Torque limit level (*1) 150% 0 to 400%
When Pr. 810 = 0, 1st quadrant Pr. 22
2nd quadrant Pr. 812
3rd quadrant Pr. 813
4th quadrant Pr. 814
Extended mode
803
Constant power range
torque characteristic
selection
0
0
Constant power limit
(torque current limit and control)
1
Constant torque limit
(torque limit and control(*3))
810
Torque limit input
method selection
0
0
Internal torque limit
Parameter-set torque limit operation is performed.
1
External torque limit
Torque limit based on the analog voltage from
terminal 3
811
Set resolution
switchover
0
Speed setting and
running speed monitor
increments from the RS-
485 communication or
communication option.
Torque limit setting
increments
Pr. 22, Pr. 812 to
Pr. 817
01r/min
0.1%
10.1r/min
10 1r/min
0.01%
11 0.1r/min
812
Torque limit level
(regeneration)
9999
0 to 400%,
9999
Valid in the regeneration mode when Pr. 810 = 0.
9999: Pr. 22 value is used for limit.
813
Torque limit level
(3rd quadrant)
9999
0 to 400%,
9999
Valid in the reverse rotation driving mode when Pr.
810 = 0.
9999: Pr. 22 value is used for limit.
814
Torque limit level
(4th quadrant)
9999
0 to 400%,
9999
Valid in the regeneration mode when Pr. 810 = 0.
9999: Pr. 22 value is used for limit.
815 Torque limit level 2 9999
0 to 400%,
9999
When the torque limit selection (TL) signal is on,
Pr. 815 is used as the torque limit value regardless
of Pr. 810.
Valid when torque limit selection (TL) terminal input
is provided.
9999: Depending on Pr. 22 setting
816
Acceleration torque limit
level (*2)
9999
0 to 400%,
9999
Set the torque limit value during acceleration.
9999: Same torque limit as at constant speed
817
Deceleration torque limit
level (*2)
9999
0 to 400%,
9999
Set the torque limit value during deceleration.
9999: Same torque limit as at constant speed
CAUTION
*1.Output current level (stall prevention function) is activated to prevent the inverter from alarm stop due
to overcurrent etc. during V/F control. When "0" is set in Pr. 22, stall prevention function is invalid.
*2.Pr. 816 "acceleration torque limit level" and Pr. 817 "deceleration torque limit level" are invalid during
position control.
*3.For torque limit and torque control, torque is restricted and controled not by magnetic flux.
speed position speed torque position
speed position
Speed command
Speed control
Iq current control
IM
Encoder
Torque limit