Recent posts to Persistent - update applicationhttps://forge.codesys.com/forge/talk/Engineering/thread/beb77b7498/2020-02-27T14:37:03.525000ZRecent posts to Persistent - update applicationPersistent - update application2020-02-27T14:37:03.525000Z2020-02-27T14:37:03.525000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com1ecd38356402451e8b14eaac4511c075b013c9c6<div class="markdown_content"><p>Hi,<br/>
which device and which version are you using?<br/>
If the retain/persist vars do not work reliable try to solve the root cause... there is not need to Workaround<br/>
by any XML file ( even I think this is not possible)</p>
<p>BR<br/>
Edwin</p></div>Persistent - update application2020-02-27T14:37:02.161000Z2020-02-27T14:37:02.161000ZSébastien Rollehttps://forge.codesys.com/u/sebastien-rolle/https://forge.codesys.coma889bb3b1ae7d38b2d1c9712017a375057cfff05<div class="markdown_content"><p>Thank. Do you know if there is some documentation about these XML tags ?</p></div>Persistent - update application2020-02-27T14:37:01.670000Z2020-02-27T14:37:01.670000ZdFxhttps://forge.codesys.com/u/dfx/https://forge.codesys.comcbe92e14ff7d40339d7edfc58d9eb76dc2858564<div class="markdown_content"><div class="codehilite"><pre><span></span><span class="nt"><initialValue></span>
<span class="nt"><simpleValue</span> <span class="na">value=</span><span class="s">"0"</span> <span class="nt">/></span>
<span class="nt"></initialValue></span>
</pre></div>
<p>This forces your value when downloading with rebuild all.</p>
<p>Just don't rebuild all, or update your initial values.</p></div>Persistent - update application2020-02-27T14:37:01.164000Z2020-02-27T14:37:01.164000ZSébastien Rollehttps://forge.codesys.com/u/sebastien-rolle/https://forge.codesys.com087f54f9a3480ea92304cb89ae949db9cf2e9969<div class="markdown_content"><p>Hello,</p>
<p>i am looking for information about persistent variables. I made a program which declare some persistent variables. Everything work fine and when the device shutdown and restart, the variable are indeed persistent in the right way. When i change the program (not the PersistentVars) and upload the new program to the device, the persistent variables are not restored as expected : not always, depending on the modification i made to the programe. <br/>
I had try a lot a things but do not understand why when i made a change to the program, sometime the persistent variables restart from 0 (persistent lost) and sometime the persistent variables keep its latest value. When exporting in OpenXML, i saw that sometimes tags "Checksum_Type" and "checksumnoinit_override" are added.</p>
<p>Does someone can help me understand if this behaviour is correct or not ? Does someone know the meaning of the tag "Checksum_Type" and "checksumnoinit_override" ?</p>
<div class="codehilite"><pre><span></span> <span class="nt"><globalVars</span> <span class="na">name=</span><span class="s">"PersistentVars"</span> <span class="na">retain=</span><span class="s">"true"</span> <span class="na">persistent=</span><span class="s">"true"</span><span class="nt">></span>
<span class="nt"><variable</span> <span class="na">name=</span><span class="s">"_A"</span><span class="nt">></span>
<span class="nt"><type></span>
<span class="nt"><DINT</span> <span class="nt">/></span>
<span class="nt"></type></span>
<span class="nt"><initialValue></span>
<span class="nt"><simpleValue</span> <span class="na">value=</span><span class="s">"0"</span> <span class="nt">/></span>
<span class="nt"></initialValue></span>
<span class="nt"><addData></span>
<span class="nt"><data</span> <span class="na">name=</span><span class="s">"http://www.3s-software.com/plcopenxml/attributes"</span> <span class="na">handleUnknown=</span><span class="s">"implementation"</span><span class="nt">></span>
<span class="nt"><Attributes></span>
</pre></div>
<p><span style="color: #4000FF;"> <strong> <attribute name="Checksum_Type" value="3401061445"></attribute></strong></span><br/>
<br/>
<br/>
<br/>
<br/>
<adddata><br/>
<data handleunknown="implementation" name="http://www.3s-software.com/plcopenxml/attributes"><br/>
<attributes><br/>
<strong><attribute name="checksum_override" value="2196742183"></attribute></strong><br/>
<attribute name="authentification" value="d433c4d1-208a-4b7a-b4ba-e3c77e67e46b"><br/>
<attribute name="vfinitonly" value=""><br/>
<attribute name="dummy" value="0"><br/>
<strong><attribute name="checksumnoinit_override" value="2363421397"></attribute></strong><br/>
</attribute></attribute></attribute></attributes><br/>
</data><br/>
</adddata><br/>
</p></div>