OPC Identifier for the CygNet OPC Server

The OPC identifier of a CygNet point is its fully qualified tag string, which must be one of the CygNet tag string formats. You can use CygNet Explorer to view the tag strings. Go to the PNT view, and right-click on a point and copy its tag string to the clipboard.

See Omitting the Site.Service Specifier in the OPC Item for more information about tag formats and tag resolution.

By default, the CygNet OPC Server will return the value of a point.

Optionally, you can define a specific property to return by appending the property to the tag string using a semicolon (;).

Syntax

TagString;Property

Example

MYSITE.UIS::ASH_WL.PRCASXIN;ALARMACK

This example returns the alarm acknowledgment state of the ASH_WL casing pressure point.

See Register Points with the CygNet OPC Server for a list of supported tag formats for the CygNet OPC Server.

More:

ArrowAvailable Point Properties for the CygNet OPC Server

ArrowOmitting the Site.Service Specifier in OPC Item for the CygNet OPC Server

ArrowUsing External ID-based Tags in the OPC Item for the CygNet OPC Server