Select Oldest Item


Select Oldest Item confirms that the decision is valid based on the lowest standard attribute value in its source region.

This does not eliminate any other decision.


This function block has the following parameters:



Item Class

Class of Item to be used in the comparison.

Attribute Name

Name of attribute to be used in comparison.

Start Character

Start character within the attribute value.

Number of Characters

Number of attribute value characters used in the comparison. This allows the operator to use a subsection of the attribute.

To use the entire attribute value in the comparison, set this value to 0.

More information

Select Oldest Item example.

Select Oldest Item pseudo code.

Routing function blocks list.