Mitsubishi Electric FR-A700 Technical Manual page 249

2.9.2 Torque limit level setting [Pr. 22, 406, 803, 810 to 817, 858, 865, 868, 874]
This function limits the output torque to the predetermined
value during speed control under Real sensorless vector
control and vector control.
In [Pr. 810 Torque limit input method selection], you can select
whether to set the torque limit level using parameters ([Pr.
22(Pr. 812 to 814)]) or using analog input terminals (terminal
1, 4, terminal 6 (FR-A7AZ)).
Turning TL signal ON sets [Pr. 815 Torque limit level 2] as the
torque limit level.
[Pr.] Name
Stall prevention operation level
22
(Torque limit level)
High resolution analog input
406
selection
Constant power range torque
803
characteristic selection
810 Torque limit input method selection
811 Set resolution switchover
812 Torque limit level (regeneration)
813 Torque limit level (3rd quadrant)
814 Torque limit level (4th quadrant)
815
Torque limit level 2
816 Acceleration torque limit level
817
Deceleration torque limit level
858
Terminal 4 function assignment
865
Low speed detection
868
Terminal 1 function assignment
874
OLT level setting
* When FR-A7AZ is installed, torque limit from terminal 6 is also available.
In addition, you can set torque limit level for forward (power
driving/regeneration)
regeneration) operation individually.
Under Real sensorless vector control, the lower limit of
torque limit level is set 30% if the value less than 30% is
input.
Initial Value Setting Range
150/200% 0 to 400%
*1
9999 0, 2 to 6, 9999
0
0
1
0
0
1
0
0
1
10
11
0 to 400%
9999
9999
0 to 400%
9999
9999
0 to 400%
9999
9999
0 to 400%
9999
9999
0 to 400%
9999
9999
0 to 400%
9999
9999
0 0, 4, 9999
1.5H 0 to 400H
Z Z
0 0 to 6, 9999
150% 0 to 200%
283
and reverse
Description
Set the torque limit level in % on the assumption that the rated
torque is 100%.
*1 For the 3.7K or less, the value changes from 150% to 200%
when V/F control or Advanced magnetic flux vector control is
changed to Real sensorless vector control or vector control.
When the setting value is "4", torque limit level can be
changed with a signal to terminal 6.
When the setting value is "2", regenerative torque limit level
can be changed with a signal to terminal 6.
Select the torque limit in the
Constant motor output limit
constant power range by
Constant torque limit torque limit setting.
Internal torque limit
(Torque limit by parameter setting)
External torque limit
(Torque limit by terminal 1, 4*)
Speed setting and running
speed monitor increments Torque limit setting increments
from the PU, RS-485 [Pr. 22],
communication or [Pr. 812 to Pr. 817]
communication option.
1r/min
0.1%
0.1r/min
1r/min
0.01%
0.1r/min
Set the torque limit level for forward rotation regeneration.
[Pr. 22]/limit at the analog terminal value
Set the torque limit level for reverse rotation driving.
[Pr. 22]/limit at the analog terminal value
Set the torque limit level for reverse rotation regeneration.
[Pr. 22]/limit at the analog terminal value
When the torque limit selection (TL) signal is ON, the [Pr. 815]
value is a torque limit value regardless of [Pr. 810] .
Torque limit set in [Pr. 810] is valid.
Set the torque limit value during acceleration.
Same torque limit as at constant speed
Set the torque limit value during deceleration.
Same torque limit as at constant speed
When 4 is set, the torque limit can be changed with a signal to
terminal 4.
The low speed detection signal (LS) is output when the output
frequency decreases below the setting.
When 4 is set, the torque limit can be changed with a signal to
terminal 1.
When 2 is set, the regenerative torque limit can be changed
with a signal to terminal 1.
This function can make an inverter trip if the torque limit is
activated to stall the motor. Set the output level for a trip.
PARAMETER
A700
(A700)
(power driving/
2