LS LSLV-iV5 Series, Руководство пользователя

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6. Function Description
6-65
Droop Control Calculation Example

When Torque Ref is Positive:
Droop Ref speed = ( Torque Ref [%]
－
Droop Starting Torque[%] ) * Droop Quantity[%]
The result value becomes positive. Therefore, final speed ref value decreases and it should be,
(Speed Ref – Droop Ref speed)
＞
Droop low limit speed
Droop
Ref speed
＜
(Speed Ref – Droop low limit speed)
Therefore, positive limit is “ Speed Ref
－
Droop Low Limit Speed ” .

When Torque Ref is Negative:
Droop Ref speed =
－
( Torque Ref [%]
－
Droop Starting Torque[%] ) * Droop Quantity [%]
The result value becomes negative. Therefore, final speed ref value increases and it should be,
(Speed Ref – Droop Ref speed)
＜
Max Motor speed
Droop
Ref speed
＞
－ (Max Motor speed － Speed Ref)
Therefore, negative limit is “ Max Motor speed
－
Speed Ref ” .
6.5.8 Torque control
One mode among the speed control mode and torque control mode can be set at CON_01( ‘ Control Mode ’ ). The
default is the speed control mode. Control mode can be selected using the multi-function terminal input set to
‘ Spd/Trq Sel ’ . This method has a priority over the one by CON_01.
(Setting example) Programming P6 as Torque control
Code LCD display Description Setting range Unit Setting
DIO_06 P6 define
Multi-function input terminal
P6 definition
Spd/Trq sel
CON_01 Control Mode Control mode setting
Speed
Torque
Sensorless
Torque
1) CON_31 (Torque Reference Source Selection) / CON_32 (Torque Reference Source)
In the speed control mode, the output of the ASR acts as the torque reference. In the torque control mode, the
torque reference is set by the analog input signal defined as ‘ Trq Ref Src ’ on the control circuit terminal or by the
option board and the polarity is reversed if the direction of the speed command is changed. If the analog input is used
as the torque reference, the analog input ranging from – 10V to 10V is converted to the percentage of the rated torque
(-100~100%) to obtain the torque reference, which can set from – 250% to 250% by the settings of Gain and Bias.
CON_31 “ Torque Ref ” defines torque ref. value when torque source is set to Keypad.