https://forge.codesys.com/forge/talk/Engineering/thread/1c4a961fca/2020-02-27T14:05:03.154000ZRecent posts to Real value - FPU underfllow2020-02-27T14:05:03.154000Z2020-02-27T14:05:03.154000Zdonicihttps://forge.codesys.com/u/donici/https://forge.codesys.come9fefc1af67e74eeabaa2421ebaf6823f2c658ba

<div class="markdown_content"><p>Hello!</p> <p>I thing I detected a bug regarding the REAL values.<br/> The transfer single precision IEE754 REAL values with the binary Exponent equal to 0 are triggering a FPU underflow exception.</p> <p>VAR<br/> rReal1: REAL;<br/> END_VAR</p> <p>rReal1:=1.18E-38; //it works 0b0<strong>00000001</strong>00000000111110110011001<br/> rReal1:=1.17E-38; //it generates the exception 0b0<strong>00000000</strong>11111110110011011010111</p> <p>Where could be the problem?</p> <p>I'm using Codesys V3.5 SP3 Patch 3 with an IDS ACOS750 device.</p></div>