Introduction

You can define a conversion rule when you want to adjust data for another system of units. This data is executed for a specific order of magnitude and unit of measure.

You define conversion rules in a “Unit Conversion” object. CODESYS automatically implements each conversion rule as a function block ‎<name>_Impl‎ and instances it as ‎<name>‎. Each conversion rule has the ‎Convert‎ and ‎Reverse‎ methods. As a result, you can use a function block as usual. Locations where you access a variable, you can link the variable to a conversion rule. The Input Assistant provides conversion rules in the “Function Blocks” and “Instance Calls” categories. After execution, the result is a converted value according to the conversion rule.

In a visualization, an IEC variable that is configured in an element property can also be linked to a conversion rules.