To implement a counter in MATLAB Simulink that increments and resets to 0 after reaching 20 while retaining the accumulated values

I want to create an increment counter; once it reaches 20, it should reset to 0, but the existing values should be present and added with the current values. How can I develop this logic in MATLAB Simulink ?

[Paul]

Hi Mahendran,

Can you clarify the meaning of "existing values should be present and added with the current values"?

Answer 1

[Ayush]

Hi Mahendran,

I understand you need to implement the logic of incrementing a counter and once it reaches a certain limit, it should reset to 0 but the sum achieved should be preserved.

You can use several blocks for achieving this logic in MATLAB Simulink R2022b like:

1. “Constant block”: To maintain the value of counter
2. For reading more about this block, refer here: https://www.mathworks.com/help/releases/R2022b/simulink/slref/constant.html
3. Unit delay block: It helps in incrementing the values of counter. For reading more about this, refer here: https://www.mathworks.com/help/releases/R2022b/simulink/slref/unitdelay.html
4. Memory block: It helps to preserve the sum achieved till now. For reading more about this block, refer here: https://www.mathworks.com/help/releases/R2022b/matlab/ref/memory.html
5. Switch block: It helps to reset the value once the counter reaches 20. For reading more about this block, refer here: https://www.mathworks.com/help/releases/R2022b/simulink/slref/switch.html
6. Relational operator block: It helps to check whether the counter has reached value 20 or not. For reading more about this block, refer here: https://www.mathworks.com/help/releases/R2022b/simulink/slref/relationaloperator.html

I have attached the Simulink model implementing the above logic for your reference with this answer.

Hope it helps!

[MAHENDRAN A]

Hi Ayush,

Thanks for helping me, but I've tried this already and it doesnt work, as when comparing the overall input and output, its not matching.

Lets say, my input is constant 1, after reaching 20 it will reset, now totally three cycles of increment done, lets assume. so the overall acccumulated value should be 60 right, but with the above logic its going like 610. so the accuracy is not correct

[MAHENDRAN A]

But yeah it workss, we need add a divide with the final value, to get accurated output, but i dont why its getting multiplied into 10 anf giving, lets say, the value which I'm expecting is 61, but npw with this logic, its coming 610, so i just divide by 10 at output signal.

If you know, how its multiplying the value 10, please let me know.

[Ayush]

The above model is implementing the following logic:

1 + 2 + 3 + 4 + .... + 20 (lets say this sum is equal to x)

now, let's say number of iterations are y.

the model gives the following output: x*y

Hope this is the expected behaviour and if not, kindly give an example to depict by taking a small input and depicting the expected output.

Hope it helps!