https://forge.codesys.com/forge/talk/CODESYS-V2/thread/767d870ab4/2020-02-27T20:09:33.393000ZRecent posts to how to read the data from array2020-02-27T20:09:33.393000Z2020-02-27T20:09:33.393000Zt.lundahlhttps://forge.codesys.com/u/t-lundahl/https://forge.codesys.comed6c4e6e99a3770b75db8707fafc3d7955f61e57

<div class="markdown_content"><p>I don't think so. Usually your are dealying with non dynamic variables in PLC's.<br/> I don't know how it is the Codesys 3 with C/C++ code.</p> <p>/Torbjörn</p></div>

2020-02-27T20:09:29.695000Z2020-02-27T20:09:29.695000Zparthi1980https://forge.codesys.com/u/parthi1980/https://forge.codesys.com946ba045b35bfe6dad3efdfe31b445ecc34fce70

<div class="markdown_content"><p>Is that any option to Insert / delete the element from Array?</p></div>

2020-02-27T20:09:28.350000Z2020-02-27T20:09:28.350000Zspfeifhttps://forge.codesys.com/u/spfeif/https://forge.codesys.comf3f1b1c3c864dba426f5981e89c22d10d0a251bf

<div class="markdown_content"><p>Since you are that new I would like to be clear. It appears that you said you want to read the data then you would do the following:</p> <p>Byte0 := CanDataRec<span>[0]</span>;<br/> Byte1 := CanDataRec<span>[1]</span>;<br/> Byte2 := CanDataRec<span>[2]</span>;<br/> Byte3 := CanDataRec<span>[3]</span>;<br/> Byte4 := CanDataRec<span>[4]</span>;<br/> Byte5 := CanDataRec<span>[5]</span>;<br/> Byte6 := CanDataRec<span>[6]</span>;<br/> Byte7 := CanDataRec<span>[7]</span>;</p> <p>Now a few things: You don't need to add them to anther variable you already have them in the array but from my experience you will want to know how to read a 16 bit variable and 32 bit variable from your data array:</p> <div class="codehilite"><pre><span></span><span class="k">FUNCTION</span> <span class="n">IO_BYTES_To_WORD</span> <span class="p">:</span> <span class="n">WORD</span> <span class="p">(</span><span class="o">*</span> <span class="err"> </span> <span class="err"> </span><span class="n">IN0</span> <span class="o">=</span> <span class="n">LSB</span> <span class="err"> </span> <span class="err"> </span><span class="n">IN1</span> <span class="o">=</span> <span class="n">MSB</span> <span class="o">*</span><span class="p">)</span> <span class="n">VAR_INPUT</span> <span class="err"> </span> <span class="err"> </span><span class="n">In0</span><span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="p">:</span><span class="n">BYTE</span><span class="p">;</span> <span class="err"> </span> <span class="err"> </span><span class="n">In1</span><span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="p">:</span><span class="n">BYTE</span><span class="p">;</span> <span class="n">END_VAR</span> <span class="n">VAR</span> <span class="err"> </span> <span class="err"> </span><span class="n">wTemp</span><span class="err"> </span> <span class="err"> </span><span class="p">:</span><span class="n">WORD</span><span class="p">;</span> <span class="n">END_VAR</span> <span class="n">wTemp</span><span class="err"> </span> <span class="err"> </span><span class="p">:</span><span class="o">=</span> <span class="n">In1</span><span class="p">;</span> <span class="n">wTemp</span><span class="err"> </span> <span class="err"> </span><span class="p">:</span><span class="o">=</span> <span class="n">SHL</span><span class="p">(</span><span class="n">wTemp</span><span class="p">,</span><span class="mi">8</span><span class="p">)</span> <span class="k">OR</span> <span class="n">In0</span><span class="p">;</span> <span class="n">IO_BYTES_To_WORD</span><span class="err"> </span> <span class="err"> </span><span class="p">:</span><span class="o">=</span> <span class="n">wTemp</span><span class="p">;</span> </pre></div> <p>So if you did the following:</p> <p>word1 := IO_BYTES_TO_WORD(IN0:= Byte0, IN1:= Byte1); (<em> this will give you a word / int 16 bit from your two data bytes </em>)</p> <p>Follow the same logic for getting a DWORD 32bit from 4 bytes.</p></div>

2020-02-27T20:09:24.656000Z2020-02-27T20:09:24.656000Zpeterchowhehttps://forge.codesys.com/u/peterchowhe/https://forge.codesys.com8f688024fd74cf070d5bb44e2702b37ce50512bd

<div class="markdown_content"><p>thank you very much!</p></div>

2020-02-27T20:09:23.341000Z2020-02-27T20:09:23.341000Zt.lundahlhttps://forge.codesys.com/u/t-lundahl/https://forge.codesys.com37936621c61e8689d2384472359c8c431466b21e

<div class="markdown_content"><p>Hi!</p> <p>Is it this you need?<br/> Your arrCAN probably have from <span>[0]</span>-<span>[7]</span></p> <p>arrCANbus<span>[0]</span> = byte 1<br/> arrCANbus<span>[1]</span> = byte 2<br/> arrCANbus[x] = anybyte in the range see above.</p> <p>/Torbjörn</p></div>

2020-02-27T20:09:22.007000Z2020-02-27T20:09:22.007000Zpeterchowhehttps://forge.codesys.com/u/peterchowhe/https://forge.codesys.comcc423a53808936406525c6fbceadf0f4172e916f

<div class="markdown_content"><p>Hi, all, i am starter for codesys system.</p> <p>Now i have read the 8 bytes array from canbus.</p> <p>but i need the data byte1 and 2, </p> <p>i have no idea how to get these data. please help.</p></div>