› PLCGurus.NET Live & Interactive Forum › PLC Questions and Answers › Rockwell, Allen-Bradley, Stratix › Controller Tags
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- April 14, 2021 at 1:59 pm #20162
James White
ParticipantKarma: 19Rank: PadawanIs there a way to move local/program tags to controller tags without doing it offline?
April 24, 2021 at 8:51 am #20166PLCGuru
KeymasterHi James,
Unfortunately there is no way to do this online. When you’re creating tags essentially what you are doing is allocating a block of memory whose size is based on the data type you choose. For example, an INT will allocate 16-bits of memory which can represent a number from -32,768 to 32,767. Whereas, a DINT will allocate 32-bits of memory for that tag which can represent a much bigger number -2,147,483,648 to 2,147,483,647. These memory allocations cannot be changed dynamically at runtime.
Hope that helps!
April 26, 2021 at 1:09 pm #20170Ken S
ParticipantKarma: 172Rank: JediJust create controller tags with the same name, and change the tag for the instructions to use the controller tag. Then delete the program tags.
If you have a lot of them – I exported and edited the exported file in EXCEL and then re-imported it, that made it quick a 5 minute downtime operation versus a lot
April 26, 2021 at 1:11 pm #20171Ken S
ParticipantKarma: 172Rank: JediJust create controller tags with the same name, and change the tag for the instructions to use the controller tag. Then delete the program tags.
If you have a lot of them – I exported and edited the exported the tag file in EXCEL and then re-imported it, that made it quick a 5 minute downtime operation versus a lot
April 26, 2021 at 1:13 pm #20172Ken S
ParticipantKarma: 172Rank: JediWhat I mean is the excel file shows program tags one way and controller tags another way – just match the same pattern in the excel file for controller tags and you will have an easy import.
April 27, 2021 at 8:54 am #20173PLCGuru
KeymasterSome great tips here Ken! I’m seeing one of your posts here twice…hmmm. That’s strange.
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