https://forge.codesys.com/forge/talk/CODESYS-V2/thread/4df63fd884/2020-02-27T20:15:44.001000ZRecent posts to Scaling2020-02-27T20:15:44.001000Z2020-02-27T20:15:44.001000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com79f83584bfa8d7d4e8b87e6e2317f92dc6f69e30

<div class="markdown_content"><p><em>Originally created by:</em> scott_cunningham</p> <p>This is a linear equation of style y = ax + b. I will leave you to fill in the blanks on the equation details.</p> <p>So create a FUNCTION - but you first need to decide your data type. INT or REAL... You are using nice rounded numbers, so I will pick INT (using ST language):</p> <div class="codehilite"><pre><span></span><span class="nt">FUNCTION</span> <span class="nt">GetDistance</span> <span class="o">:</span> <span class="nt">INT</span> <span class="nt">VAR_INPUT</span> <span class="err"> </span> <span class="err"> </span><span class="nt">Raw</span> <span class="o">:</span> <span class="nt">INT</span><span class="o">;</span> <span class="nt">END_VAR</span> <span class="nt">VAR</span> <span class="nt">CONSTANT</span> <span class="err"> </span> <span class="err"> </span><span class="nt">SCALE</span><span class="o">:</span> <span class="nt">INT</span> <span class="o">:=</span> <span class="nt">123</span><span class="o">;</span> <span class="err"> </span> <span class="err"> </span><span class="nt">OFFSET</span><span class="o">:</span> <span class="nt">INT</span> <span class="o">:=</span> <span class="nt">123</span><span class="o">;</span> <span class="nt">END_VAR</span> <span class="nt">GetDistance</span> <span class="o">:=</span> <span class="nt">Raw</span> <span class="o">*</span> <span class="nt">SCALE</span> <span class="o">+</span> <span class="nt">OFFSET</span><span class="o">;</span> <span class="nt">END_FUNCTION</span> </pre></div> <p>Then in your regular program you can simply write:</p> <div class="codehilite"><pre><span></span><span class="n">Cm</span> <span class="p">:</span><span class="o">=</span> <span class="n">GetDistance</span><span class="p">(</span><span class="mi">500</span><span class="p">);</span> </pre></div> <p>HINT: Always make sure you don't overflow the data type! INT only goes to +32767.</p></div>

2020-02-27T20:15:40.234000Z2020-02-27T20:15:40.234000ZLasserahttps://forge.codesys.com/u/lassera/https://forge.codesys.com2ef539ad403342a251df1b7c1676b9222722c471

<div class="markdown_content"><p>Hello!</p> <p>i am new with programming so i'm asking maybe stupid questions, so if i have analog input what gives value from 400 to 1000. Value 400 is for example 80 cm and 1000 is 1100cm. How i can make a program which tells automatically how many cm is value 500?Hope somebody understand this...</p> <p>thanks</p></div>