![]() ![]() ![]() ![]() The order in which members of UDTs are listed determines their order in memory. UDTs may not be modified on-line. Changing them requires a download, so plan ahead! UDT Member Order Combine data to be transferred as one tag for processors-to-processor communication.Combine data to be transferred as one tag between AOIs (Add-On-Instructions).Reduce development time for multiple similar devices.User Defined Types (UDTs) allow data of different types to be combined into a single controller tag. Note that Rockwell controllers in other families lack some of the features discussed below. These will collectively be referred to here as “CLx”. This two part series focuses on using Rockwell ControlLogix, CompactLogix, and similar controllers programmed by RSLogix5000 / Studio5000. ![]()
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