https://forge.codesys.com/forge/talk/CODESYS-V2/thread/09afdf5848/2020-02-27T22:03:05.799000ZRecent posts to LIN_TRAFO Scaling function2020-02-27T22:03:05.799000Z2020-02-27T22:03:05.799000Zshooterhttps://forge.codesys.com/u/shooter/https://forge.codesys.com439c4cb9ad6fc43fe060efac52be8e9e6ddbfd0c

<div class="markdown_content"><p>this answer is wrong</p> <p>the bits are in different place.</p> <p>check your analog card for this, mine begin at 7 (bits are shifted) and stop at 4095-7.</p> <p>to scale use simple math like y=a+bx</p> <p>b = 250/ 4081 </p> <p>and a=0 for a normal 4/20 mA card.</p> <p>stay as long as possible in INTeger for speed calcs.</p></div>

2020-02-27T22:03:01.422000Z2020-02-27T22:03:01.422000Ztimvhhttps://forge.codesys.com/u/timvh/https://forge.codesys.comf71f3357cd015d23a762e05bc6739a70b4dbf532

<div class="markdown_content"><p>In ST you could do it like this:</p> <p>Pressure := analogValue * 250 / 4095;</p></div>

2020-02-27T22:02:59.891000Z2020-02-27T22:02:59.891000ZShohadawyhttps://forge.codesys.com/u/shohadawy/https://forge.codesys.com7df68ffc55d368e9dc19846bd12e6b8413bfee07

<div class="markdown_content"><p>I'm using a pressure sensor that outputs 4-20mA related to a pressure of 0-250 bar. There is an example for a sensor in the manual which states that I should put the sensor range "4-20 mA" in the IN_MIN and IN_MAX respectively.I tried this but I got great errors in the reading</p> <p>The resolution of the A/D of the DUO PLC is 12 bits, shall I put 0 in the IN_MIN and 4095 in the IN_MAX</p> <p>Waiting for your reply.</p></div>