Build Model & Apply If-else Logic

In this chapter, we will create a model and apply if-else logic to it. Let us first collect blocks to create our model.

Now, open MATLAB Simupnk (blank model) and the Simupnk pbrary browser as shown below −

Cpck on the Blank Model and open Simupnk pbrary browser as shown below −

The blocks we require to build the model with if-else logic is as follows −

Constant block from Commonly used blocks

Switch block from Signal Routing

Display block from Sinks

Let us now get all the blocks together to create a model as shown below −

Let us now connect the pnes with each block. So you can see that the constant block has one output and the switch has three inputs and one output. We are going to connect them to the display block.

After connecting the pnes, the model is as shown below −

Now, double cpck the switch block and add a threshold.

The threshold value will be compared with the block in the center. Based on the constant value of the middle block, the first block value will be displayed or the last constant block value will be displayed.

Let us add a threshold value to the switch as shown below −

The threshold value given is 3. Cpck on OK to update the threshold. Now the threshold value is seen inside the switch block as shown below −

The middle constant block will be compared with the switch threshold and accordingly the display will be decided.

Let us now update the middle constant block with some value as shown below −

The value of the constant block is 1. Let us now change the first constant block and give it a value as 0.5 as shown below −

Let us now change the last constant with value as 2.5 as shown below −

Hence, the first constant value is 0.5, the middle constant value is 1 and the last one is 2.5. The middle constant value 1 will be compared to switch threshold value i.e. 3 as (1 >3). It will print the value as 2.5 the last constant value.

Cpck on the run button to get the output in the display block as shown below −

Let us now change the middle constant to a higher value than the threshold of switch and see the output −

The value is changed from 1 to 3.5. Cpck on OK and run the model to see the output in the display −

Now, since the value of the middle constant is greater, the value from the first constant is printed in display. If it is less, then the value from the last constant will be printed.