How does the PLC control the speed of the motor?
PLC pulses are controlled by stepping (servo) running distanceSet the frequency of PLC pulse, you can control the stepper (servo) running speed
See what you choose the motor, the general AC motor does not need PLC, you can use the frequency converter speed, how much speed you can change the frequency of inverter output current. If it is a stepping motor or a private server, a drive is needed, and a PLC is used to send a pulse control drive to drive the motor. PLC each sends a pulse, the motor turns an angle.
How does the PLC control the speed of the motor?:There are a variety of ways, can be used in position control mode, PLC send a certain frequency pulse to the servo drive, a set of electronic gear ratio, the motor will run at a certain speed, change the speed of the motor only need to change the frequency of the pulse on the line, can also use the speed control mode, with a 0 PLC output to the positive and negative 10 volt analog voltage to the servo driver, set a speed command gain parameter, can control the motor rotation, the motor speed is proportional to the value of analog voltage.
