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Write to tags in a different folder on PLC
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Topic: Write to tags in a different folder on PLC (Read 1778 times)
hunkyjohn
Newbie
Posts: 2
Write to tags in a different folder on PLC
«
on:
March 19, 2014, 09:26:16 AM »
How do I write to tags that are located in a different folder than the first folder. I can write successfully to any tags under the first Folder called "Controller" then a child folder called "Controller Tags" ie. Controller\Controller Tags.
The tags I want to write to are located at a sibling folder "Tasks" then a child folder called "Machine_Task" then a another child folder called "ProblemSolver" and finally "Program Tags" ie. Tasks\Machine_Task\ProblemSolver\Program Tags.
I get an error "InvalidCastException was unhandled Conversion from string "Box 1" to type 'Short' is not valid." when I try to write to this new location in the PLC.
I am new at this and I don't know anything about PLC's any help would be appreciated.
Steve
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Archie
Administrator
Hero Member
Posts: 5322
Re: Write to tags in a different folder on PLC
«
Reply #1 on:
March 19, 2014, 09:43:13 AM »
There are two scopes of tags, Controller and Program. To access an Program scope tag, the name must be preceded by "PROGRAM:" following by the program name, then a period, then the tag name. For example:
PROGRAM:Task1.MyTag
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hunkyjohn
Newbie
Posts: 2
Re: Write to tags in a different folder on PLC
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Reply #2 on:
March 19, 2014, 09:55:52 AM »
Thanks, that worked.
Steve
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Write to tags in a different folder on PLC