Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

8 Operation8.9.3 Torque Limiting Using an Analog Voltage Reference8.9.3 Torque Limiting Using an Analog Voltage ReferenceTorque limiting by analog voltage reference limits torque by assigning a torque limit in an analog voltage to theT-REF terminals (CN1-9 and 10). This function can be used only during speed or position control, not duringtorque control.Refer to the following block diagram when the torque limit with an analog voltage reference is used for speedcontrol.SERVOPACKTorque limitvalueT-REFPn400Forward torquelimit value (Pn402)SpeedreferenceV-REFPn300+-Speed loopgain(Pn100)Speed loopintegraltimeconstant(Pn101)++Reverse torquelimit value (Pn403)TorquereferenceSpeed feedbackINFOThere is no polarity in the input voltage of the analog voltage reference for torque limiting. The absolute values of both +and - voltages are input, and a torque limit value corresponding to that absolute value is applied in the forward or reversedirection.(1) Related ParametersParameterMeaningPn002 n.1 Speed control option: Uses the T-REF terminal to be used as an external torque limit input.When n.2 is set, the T-REF terminal is used for torque feed-forward input, but the functions cannot be used together.(2) Input SignalsTypeSignalNameConnectorPin NumberNameInput T-REF CN1-9 Torque reference inputSG CN1-10 Signal ground for torque reference inputThe torque limit input gain is set at parameter Pn400. Refer to 8.7.1 Setting Parameters.• Input Specifications• Input range: ±1 VDC to ±10 VDC/rated torque• Maximum allowable input voltage: ±12 VDC8-72