Mitsubishi Electric FR-A820-00046 Instruction Manual page 265

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Pr.
813
H702
814
H703
815
H710
816
H720
817
H721
858
T040
868
T010
874
H730
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%.
NOTES The lower limit for the torque limit level under Real sensorless vector control is set to 30% even if a
value lower than 30% is set.
When the low-speed range high-torque characteristic is disabled under PM sensorless vector con-
trol (Pr. 788 = "0"), the torque limit is not activated in a low-speed range with a rated frequency of
less than 10%.
Under PM sensorless vector control, the torque limit level is reduced inversely proportional to the
output frequency in the constant output range of the rated motor frequency or higher.
FR-A800
Name
Torque limit level (3rd
quadrant)
Torque limit level (4th
quadrant)
Torque limit level 2
Torque limit level during
acceleration
Torque limit level during
deceleration
Terminal 4 function
assignment
Terminal 1 function
assignment
OLT level setting
Initial Setting
Description
value range
Set the torque limit level for reverse rotation power
0 to 400%
driving.
9999
9999 Limit using Pr. 22 or the analog terminal values.
Set the torque limit level for reverse rotation
0 to 400%
regenerative driving.
9999
9999 Limit using Pr. 22 or the analog terminal values.
When the torque limit selection (TL) signal is ON,
0 to 400%
Pr. 815 is the torque limit value regardless of Pr. 810.
9999
9999 The torque limit selected in Pr. 810 is valid.
0 to 400% Set the torque limit value during acceleration.
9999
9999 The same torque limit as constant speed.
0 to 400% Set the torque limit value during deceleration.
9999
9999 The same torque limit as constant speed.
The torque limit level can be changed with setting
0 0, 1, 4, 9999
value "4" and the signal to terminal 4.
The torque limit level can be changed with setting
0 0 to 6, 9999
value "4" and the signal to terminal 1.
A trip can be set for when the torque limit is activated
150% 0 to 400% and the motor stalls. Set the output at which to
activate the trip.
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