• GLOBAL > PLC > Common to SX > Support tool (D300win) > When I use D300win to add variables to a certain POU and compile it for comparison, a 'comparison error' occurs even in a POU irrelevant to the cha...
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  • Displayed Date : 2023/04/25 19:00
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When I use D300win to add variables to a certain POU and compile it for comparison, a 'comparison error' occurs even in a POU irrelevant to the change. Why?

When I use D300win to add variables to a certain POU and compile it for comparison, a 'comparison error' occurs even in a POU irrelevant to the change. Why?
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Answer

This is because when a compilation process is carried out, automatically assigned variables (variables for which AT specification is not used) and FB instances are reassigned.
This memory assignment takes place in the order of assignment of POUs to tasks.