6 -134Speed/Torque Control Switching FunctionIt is possible to switch between speed control and torque control when one of the multi-function inputs (H1-01to H1-06) is set to 71 (Speed/Torque Control Change). Speed control is performed when the input is OFF andtorque control is performed when the input is ON. Set d5-01 to switch speed/torque control.Setting the Speed/Torque Control Switching TimerThe delay between a change in the speed/control switching function input (ON to OFF or OFF to ON) and thecorresponding change in the control method can be set in d5-06. During the timer delay, the value of the 3 ana-log inputs will retain the values they had when the ON/OFF status of speed/torque control switching signalwas changed. Use this delay to complete any changes required in external signals.Application Precautions• The frequency reference (during speed control) is set in b1-01. The speed limit during torque control is setin d5-03.• If the torque reference has been assigned to a multi-function analog input, terminal A2, or terminal A3, theinput function changes when the control method is switched between torque control and speed control.During speed control: The analog input terminal is used as the torque limit input.During torque control: The analog input terminal is used as the torque reference input.• When the Run Command turns OFF, the control method when stopped will be for speed control. Evenfrom the torque control method, the system will automatically change to speed control and decelerate to astop when the Run Command turns OFF.• When A1-02 (control method selection) is set to 3 (flux vector control), the speed/torque change command(a setting of 71) can be set for a multi-function input (H1-01 to H1-06) to switch between speed and torquecontrol during operation. An example is shown below.A timing chart for switching between speed and torque control is shown in the following figure.Fig 6.68 Speed/Torque Control Switching Time Chart.Terminal No. User Constant No. Factory Setting Setting FunctionS8 H1-06 8 71 Speed/torque control changeA1 b1-01 1 1 Frequency reference selection(terminals A1, A2)C5-03 1 1 Speed limit (terminals A1, A2)A3 H3-05 0 13 Torque reference/torque limitSpeed/torque change signal(terminal S8 input)Run CommandControl modeTerminal A1 inputTerminal A3 inputStopOPENCLOSEDOPENCLOSEDRunSpeed Torque Speed Torque Speed (decel to stop)SpeedreferenceSpeed limitSpeedreferenceSpeed limitTorque limitTorquereferenceTorque limitTorquereference
