Mitsubishi Electric FR-A800, Instruction Manual

Page: 273 / 1042

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
FR-A800 5 - 93
Changing the setting increments of the torque limit level (Pr. 811)
●
The setting increments of Pr. 22 "Torque limit level" and Pr. 812 to Pr. 817 (torque limit level) can
be changed to 0.01% by setting Pr. 811 "Set resolution switchover" = "10, 11".
For the change of the speed setting increments using a communication option, refer to the
Instruction Manual of the communication option.
Changing the torque characteristic of the constant-output range (Pr. 803)
In torque limit operations under Real sensorless vector control or vector control, the torque charac-
teristic in a low-speed range and constant-output range can be changed.
Valid only under Real sensorless vector control.
Pr. 811 setting
Speed setting, running speed monitor increments from PU,
RS-485 communication, communication options
Torque limit setting increments
Pr. 22, Pr. 812 to Pr. 817
0 1 r/min
0.1%
1 0.1 r/min
10 1 r/min
0.01%
11 0.1 r/min
Tab. 5-31: Torque limit level increments
NOTES
The internal resolution of the torque limit is 0.024% (100/2
12
), and fractions below this resolution
are rounded off.
When Real sensorless vector control is selected, fractions below a resolution equivalent to 0.1%
are rounded off even if Pr. 811 = "10, 11" is set.
For details on changing the speed setting increments, refer to page 5-324.
Pr. 803 setting Torque characteristic in low-speed range
Torque characteristic in constant-output
range
0
Torque rise
Constant motor output
1 Constant torque Constant torque
10 Constant torque Constant motor output
11
Torque rise
Constant torque
Tab. 5-32: Torque characteristic in a low-speed range and constant-output range