Lenze 931E/K Small Drives Control - Manual (Page 33)

Commissioning
Speed control
Setpoint selection via setpoint selectors
5
l
33 SW−HB 13.0002−EN 4.1
Torque limitation
As already mentioned, with speed control, it is possible to define a torque limitation. In this
case, the selected setpoint source will specify a maximum torque which will symmetrically
limit the setpoint for the current and torque controller.
Please observe that the current setpoint will also be limited by the rated current and
maximum current values selected in the Motor data menu. The current setpoint will thus
always be limited to the lower torque limit value.
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Note!
Applications requiring torque control in a quadrant, i.e. a torque setting from
zero to maximum in one direction of rotation, can usually be conveniently
implemented with speed control and torque limitation:
ƒ The torque setpoint is selected via the torque limitation
ƒ The speed setpoint is selected via a separate setpoint to ensure that the
drive will not "race" when no load is applied. The speed will be limited to
manageable values.