In this step, you use the PID Controller (Digital) block (from the Brush DC category), and the Three Phase Square Wave Inverter (from the AC Induction category) to design the volts/frequency controller for the motor.
After placing the blocks in your diagram, encapsulate them in a compound block using the Edit > Create Compound Block command. Name the compound block Volts/Hz Controller.
This block design requires only 2 inputs and 3 outputs. By default, when you create a compound block, Embed creates and outputs for all the blocks contained in the compound, which may not be appropriate. In this case, you must remove 2 inputs and one output using the Edit > Remove Connector command.
Now label the wire tab connectors by double-clicking each tab connector and entering the names shown below:
Next, right-click the compound block to drill into it. As mentioned before, the process of creating the compound block creates wire connections that may not be needed. Remove all wire connections within the compound by clicking, holding and dragging the wires with the left mouse button to an open space of the desktop and releasing the button.