A multi-tag specification is a specification you can generate for a group of instruments. Multi-tag specifications are frequently required because instruments of the same type have many identical parameters. A multi-tag specification contains a group of instrument tags that you can add, one by one, to the same spec sheet. A multi-tag specification is based on a specification format, which is, in turn, is based on the form that you set for assigning with multiple tags. Such a form can comprise one or more spec pages.
Instrument tags in a multi-tag spec must have identical process functions except for the following case: if the spec form process function is General but the form pages do not include any data fields from the PD_NOT_ASSIGN or PD_GENERAL tables, such a spec can contain instruments whose process functions are not identical, for example, such a spec can contain both Flow and Temperature instruments.
A multi-tag specification always contains one Notes page, one Multi-Tag List page, and one or more common pages with fields that are identical for all the tags. The Tag Number field, and other specification fields that appear on the Multi-Tag List page, show the words SEE LIST instead of data. The SEE LIST label indicates that the values in the fields appear on the Multi-Tag List tab of the spec. The Multi-Tag List page contains fields whose values can differ from tag to tag. You can change the SEE LIST label to any other text using the appropriate option on the Multi-Tag Specifications page of the Preferences dialog.
It is possible to export multi-tag specs to External Editor, where other users can edit the appropriate data settings, and then import the edited data back to Smart Instrumentation. Also, you can move tags to another multi-tag spec (to another see list), or, on removing a tag, automatically generate a single-tag spec for this tag. You cannot remove the master tag.
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You can include fieldbus instruments in a multi-tag spec. However, the software does not support editing of fieldbus data fields in a multi-tag spec.
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You cannot include composite pages in a multi-tag spec. For details of composite specs, see Composite Specifications.