With P15 set to its default value of 100% an input voltage of +10V will drive the motor at its rated speed in a CW direction. When configured as a torque controller, differential inputs AN1+ and AN1- control the motor current, effectively controlling the torque produced by the motor. The polarity of direction remains the same as when configured as a speed controller. You configure the drive as a torque controller either by setting parameter P33=1, or by setting input E3=1 when P36=3. The torque of the motor is then controlled by the voltage applied between AN1+ and AN1- where an input of 10V will generate the peak current of the drive being used.
Speed Output
The speed output (X8.10) produces an output voltage that is directly proportional to the speed of the motor. Scaling of this output is fixed, a voltage output of 8V being equivalent to a speed of 6000rpm.Analogue Input Circuits Analogue differential inputs can be connected as single analogue inputs, as shown in Figure 4-2, or as dual differential inputs, as shown in Figure 4-3.
Scaled Speed Output
The scaled speed output (X8.11) allows any selected nominal speed to generate a 0 to 10V output. The nominal speed of the motor is taken from the motor’s specification, or is automatically taken from parameter P05. Scaling is controlled by parameter P15 as follows: 10V is equivalent to {nominal speed}xP15/100 Note: This scales both the input sensitivity and the scaled speed output. For example, for a motor with a nominal speed of 3000rpm and with P15 set to 50%, a 10V input will produce a motor speed of 1500rpm and the scaled output will generate a voltage of 10V.
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