https://forge.codesys.com/forge/talk/Engineering/thread/6194c4abee/2020-02-27T13:49:15.315000ZRecent posts to Var_Config2020-02-27T13:49:15.315000Z2020-02-27T13:49:15.315000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.comf8e6d57d47a064336b844b3c1b5ccdde9764e5d5

<div class="markdown_content"><p><em>Originally created by:</em> scott_cunningham</p> <p>You have define myBit as a local variable of myFB and so you cannot reach it from PLC_PRG. You need to add something to myFB to tell it to adjust the local var (like method TurnON)... You can also assign a global variable to the output - but this will be frowned upon by some programmers.</p></div>

2020-02-27T13:49:15.222000Z2020-02-27T13:49:15.222000ZdrChiavohttps://forge.codesys.com/u/drchiavo/https://forge.codesys.com72b72809ef1362f8278ed7dcce7a4ef630e6814e

<div class="markdown_content"><p>Hello, <br/> I'm trying to use VAR_CONFIG and I'm doing the nexts steps:</p> <p>1) I create a FB:<br/> FUNCTION_BLOCK my_FB<br/> VAR_INPUT<br/> END_VAR<br/> VAR_OUTPUT<br/> END_VAR<br/> VAR<br/> myBit AT %Q*: BOOL;<br/> END_VAR</p> <p>2) Declaration in program:<br/> PROGRAM PLC_PRG<br/> myArray : ARRAY <span>[0..7]</span> OF my_FB;<br/> END_VAR</p> <p>3) In VAR_CONFIG:<br/> VAR_CONFIG<br/> PLC_PRG.myArray<span>[0]</span>.myBit AT %QX0.0 : BOOL;<br/> PLC_PRG.myArray<span>[1]</span>.myBit AT %QX0.1 : BOOL;<br/> .....<br/> PLC_PRG.myArray<span>[7]</span>.myBit AT %QX0.7 : BOOL;<br/> END_VAR</p> <p>My questions is: if I need PLC_PRG.myArray<span>[5]</span>.myBit , how do I call this into my_FB?</p></div>