Usage in IEC Editors

Overview

You can use unit conversions in all IEC editors. If you create a conversion for each new conversion, a function block is created automatically.

The function block includes 2 methods:

You can call these methods in all IEC editors.

Example in ST

In this example, Conv_4_20 is the name of the conversion.

VAR
    rValue : REAL;
    rConvertedValue : REAL;
END_VAR
rConvertedValue := Conv_4_20.convert(rValue);

Reverse calculation back to the input value.

rValue := Conv_4_20.reverse(rConvertedValue);

Example in CFC

In the CFC editor, enter the instance name of the conversion above the element. In the element, the method is defined.

Example in CFC method Convert:

 

 

Example in CFC method Reverse: