https://forge.codesys.com/forge/talk/Engineering/thread/f66ccf1567/2025-01-26T21:04:22.292000ZRecent posts to Help with __SYSTEM.VAR_INFO2025-01-26T21:04:22.292000Z2025-01-26T21:04:22.292000Zph0010421https://forge.codesys.com/u/ph0010421/https://forge.codesys.com1f87ea31af6f963e5e26ff53201361eec12e0028

<div class="markdown_content"><p>thanks...I changed to I POINTER which is perfect.</p></div>

2025-01-26T15:16:45.014000Z2025-01-26T15:16:45.014000ZFlesshttps://forge.codesys.com/u/fless/https://forge.codesys.comb1b7803825de89ee3f3922eb6bca9c97c8bef316

<div class="markdown_content"><p>to get the address just use ADR( )</p> <p>variables defined in a VAR_IN_OUT block are references pointing to the passed variables.</p> <div class="codehilite"><pre><span></span><code><span class="nt">VAR_IN_OUT</span> <span class="w"> </span><span class="nt">MyVar</span><span class="o">:</span><span class="w"> </span><span class="nt">bool</span><span class="o">;</span> <span class="nt">END_VAR</span> <span class="nt">VAR</span> <span class="w"> </span><span class="nt">adrMyVar</span><span class="o">:</span><span class="w"> </span><span class="nt">__XWORD</span><span class="o">;</span> <span class="nt">END_VAR</span> <span class="nt">adrMyVar</span><span class="w"> </span><span class="o">:=</span><span class="w"> </span><span class="nt">ADR</span><span class="o">(</span><span class="nt">MyVar</span><span class="o">);</span> </code></pre></div> </div>

2025-01-26T13:37:37.440000Z2025-01-26T13:37:37.440000Ztrusty-squirehttps://forge.codesys.com/u/trusty-squire/https://forge.codesys.com0c4e3660e77ce2528871a53acdb79213b6d23a2e

<div class="markdown_content"><p>Not knowing exactly what you want to accomplish, you can try to use</p> <div class="codehilite"><pre><span></span><code><span class="nt">VAR_INPUT</span> <span class="w"> </span><span class="nt">MyVar</span><span class="o">:</span><span class="w"> </span><span class="nt">POINTER</span><span class="w"> </span><span class="nt">TO</span><span class="w"> </span><span class="nt">BOOL</span><span class="o">;</span> <span class="nt">END_VAR</span> </code></pre></div> <p><code>MyVar</code> contains the address of your referenced variable, and <code>MyVar^</code> dereferences it allowing you to access the value. If this doesn't meet your needs, could you add more detail on what you are trying to accomplish?</p></div>

2025-01-24T12:46:09.516000Z2025-01-24T12:46:09.516000Zph0010421https://forge.codesys.com/u/ph0010421/https://forge.codesys.comd25f4c6d81afdc944474a582f7752eb3eb94df56

<div class="markdown_content"><p>hi all<br/> I have a FB with IN/OUT variable.<br/> Inside the FB, I want to get the address of the IN/OUT variable.<br/> If I use <strong>__SYSTEM.VAR_INFO</strong>, I get the address of the FB copy rather than 'external' variable.</p> <p>VAR_IN_OUT<br/> MyVar: bool;<br/> END_VAR<br/> VAR<br/> Info: __SYSTEM.VAR_INFO;</p> <p>Info := __VARINFO(MyVar);</p> <p>This give me the address of <strong>MyVar</strong> but I actually want the address of the variable passed to MyVar</p> <p>Any clues please??</p> <p>thanks, ph</p></div>