Tag Security
You can add read/write security to individual tags through the Designer. Custom Access Rights must be set to use the Role-based permissions.
To set the access rights to a tag
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Edit a tag by double-clicking on the tag.
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In the General tab, from the Access Rights drop-down, select Custom, and click OK.
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Go to the Permissions tab, from the Add a Role drop-down select the role, and click the Add button.
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Change each roles Access rights by selecting the Read/Write or Read Only options.
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Click OK.
Now the user must have appropriate permissions to write to interact with the tag.