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Torque biases (Pr. 840 to Pr. 848)
PARAMETERS
3
• When Pr. 840 = 3
Pr. 904 "torque command terminal 3 bias", Pr. 905 "torque command terminal 3 gain" and Pr. 846 "torque bias
balance compensation" can be set automatically according to the load.
Pr. 904, Pr. 905 settings
Pr. 846 setting
2) Pr. 841 "torque bias 1", Pr. 842 "torque bias 2", Pr. 843 "torque bias 3"
On the assumption that the rated torque is 100%, the torque bias setting of 1000% is the center value of torque
and the bias value is "0".
3) Pr. 844 "torque bias filter"
You can make a torque rise gentler. At this time, the torque rises according to the time constant of the primary
delay filter.
4) Pr. 845 "torque bias operation time"
Set the time for output torque be maintained with the torque bias command value alone.
5) Pr. 846 "torque bias balance compensation"
Set the voltage of the torque bias analog input value input to the terminal 3 to compensate for the balance of the
torque bias amount.
6) Pr. 847 "fall-time torque bias terminal 3 bias"
Set the torque bias amount at a fall time (when the motor runs in the reverse rotation direction).
7) Pr. 848 "fall-time torque bias terminal 3 gain"
Set the torque bias amount at a fall time.
Run under no load.
Read Pr. 904 when
speed has stabilized.
Press [WRITE] key.
(Pr. 904 setting
complete)
Press [WRITE] key.
(Pr. 905 setting
complete)
Read Pr. 905 when
speed has stabilized.
Run under
maximum load.
Balanced load
being carried.
Read Pr. 846.
Press [WRITE] key.
Torque balance compensation
in driving mode is complete.
CAUTION
When starting torque bias operation after completion of automatic setting, set "1 or 2" in Pr. 840.
Setting Description
600 to 999% Negative torque bias amount (-400% to -1%)
1000 to 1400% Positive torque bias amount (0% to 400%)
9999 Without torque bias setting
Setting Description
0 to 5s Time until torque rises.
9999 Same operation as when 0s is set.
Setting Description
0 to 5s Time for maintaining torque equivalent to the torque bias amount.
9999 Same operation as when 0s is set.
Setting Description
0 to 10V Set the voltage under balanced load.
9999 Same operation as when 0V is set.
Setting Description
0 to 400% Set the bias value of the torque command.
9999 Same as at a rise time (Pr. 904).
Setting Description
0 to 400% Set the gain value of the torque command.
9999 Same as at a rise time (Pr. 905).