https://forge.codesys.com/forge/talk/Engineering/thread/0410e3bed6/2020-02-27T14:09:17.065000ZRecent posts to how detect unused inputs in functional blocks?2020-02-27T14:09:17.065000Z2020-02-27T14:09:17.065000Zrickjhttps://forge.codesys.com/u/rickj/https://forge.codesys.com9e0a6f2adc6e27bb3cfd40600e36a7733a5fff44

<div class="markdown_content"><p>The easiest way is to define the parameter to have an invalid initial value and then test for that the first time the block is executed.</p> <p>A little more involved method is to define the parameter as REFERENCE TO {type} and then on the first execution use the __ISVALIDREF() macro (not certain about spelling as I'm away from my codesys workstation) to determine if the input is connected to anything.</p></div>

2020-02-27T14:09:16.748000Z2020-02-27T14:09:16.748000Zdiegovitorhttps://forge.codesys.com/u/diegovitor/https://forge.codesys.comd635f7071139e3f934bb8b44c9406b618f201dec

<div class="markdown_content"><p>Hi, I'm developing a functional block that has a fixed number of inputs. I just need to know internally what these inputs are being used, because the user can configure a smaller number of inputs and leave the other inactive.</p></div>