Mitsubishi FR-A800

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
PARAMETERS
185
5
5.3.4 Setting the torque limit level
 When changing from V/F control or Advanced magnetic flux vector control to Real sensorless vector control or vector control in FR-A820-
00250(3.7K) or lower or FR-A840-00126(3.7K) or lower, 150% changes to 200%.
During speed control under Real sensorless vector control, vector control, and PM sensorless vector control, and
during position control under vector control and PM sensorless vector control, the output torque is limited to prevent it
from exceeding a specified value.
The torque limit level can be set in a range of 0 to 400%. The TL signal can be used to switch between two types of
torque limit.
The torque limit level can be selected by setting it with a parameter, or by using analog input terminals (terminals 1, 4).
Also, the torque limit levels of forward rotation (power driving/regenerative driving) and reverse rotation (power driving/
regenerative driving) can be set individually.
Pr. Name
Initial
value
Setting
range
Description
22
H500
Stall prevention
operation level (Torque
limit level)
150/200% 0 to 400%
Set the torque limit level in percentage with regards to the
rated torque as 100%.
157
M430
OL signal output timer
0 s
0 to 25 s
Set the OL signal output start time at the activation of torque
limit operation.
9999 No OL signal output
803
G210
Constant output range
torque characteristic
selection
0
0
Torque rise in low-speed
range
In constant-power range,
constant motor output limit
1
Constant torque in low-speed
range
In constant-power range,
constant torque limit
10
Constant torque in low-speed
range
In constant-power range,
constant motor output limit
11
Torque rise in low-speed
range
In constant-power range,
constant torque limit
810
H700
Torque limit input
method selection
0
0
Internal torque limit
(Torque limited by parameter settings.)
1
External torque limit
(Torque limited by terminals 1 and 4.)
811
D030
Set resolution
switchover
0
0
Speed setting, running speed
monitor increments 1 r/min
Torque limit setting
increments 0.1%
1
Speed setting, running speed
monitor increments 0.1 r/min
10
Speed setting, running speed
monitor increments 1 r/min
Torque limit setting
increments 0.01%
11
Speed setting, running speed
monitor increments 0.1 r/min
812
H701
Torque limit level
(regeneration)
9999
0 to 400%
Set the torque limit level for forward rotation regenerative
driving.
9999 Limit using Pr.22 or the analog terminal values.
813
H702
Torque limit level (3rd
quadrant)
9999
0 to 400% Set the torque limit level for reverse rotation power driving.
9999 Limit using Pr.22 or the analog terminal values.
814
H703
Torque limit level (4th
quadrant)
9999
0 to 400%
Set the torque limit level for reverse rotation regenerative
driving.
9999 Limit using Pr.22 or the analog terminal values.
815
H710
Torque limit level 2
9999
0 to 400%
When the torque limit selection (TL) signal is ON, Pr.815 is
the torque limit value regardless of Pr.810.
9999 The torque limit selected in Pr.810 is valid.
816
H720
Torque limit level during
acceleration
9999
0 to 400% Set the torque limit value during acceleration.
9999 The same torque limit as constant speed.
817
H721
Torque limit level during
deceleration
9999
0 to 400% Set the torque limit value during deceleration.
9999 The same torque limit as constant speed.
858
T040
Terminal 4 function
assignment
0 0, 1, 4, 9999
The torque limit level can be changed with setting value "4"
and the signal to terminal 4.
868
T010
Terminal 1 function
assignment
0 0 to 6, 9999
The torque limit level can be changed with setting value "4"
and the signal to terminal 1.
874
H730
OLT level setting
150% 0 to 400%
A trip can be set for when the torque limit is activated and the
motor stalls. Set the output at which to activate the trip.
Sensorless
Sensorless
Sensorless
Vector
Vector
Vector
PM
PM
PM