Point Reference Properties

Use the Point reference page to configure the reference properties for a particular point. The properties listed are application specific. They are used by Service Monitoring Service points, Group Rollup points, OPC Interface Service points, evaluator library user points, etc.

Sample Point reference page for an Existing Point

These are the properties shown on the Point reference page in the PNT Editor.

Property	Description	Default Value
CygNet point reference
Type	Specifies the type of the reference point. Option is any entry from the CMPNTREF table: for example, Group Averager, Group SYFACINFO Rollup, Group Totalizer, OPC Group Facility, SvcMon Timer Ref Point.	Blank
Site	The Site of the reference point.	Blank
Service	The Service of the reference point.	Blank
Point ID	The Point ID of the reference point.	Blank
Long point ID	The Long Point ID of the reference point.	Blank
Choose point…	Click Choose Point to select a reference point.	-
External point
Type	The type of external point type. Option is any entry from the CMEXTTYP table with 10 characters maximum.	Blank
External ID	Free-form text up to 256 characters. This property can be used for linking points to an external OPC server. The format is: *server_name=<server>; machine_name=<machine>* See OPCIS Points, OPCIS Data Points, and OPCIS Groups for more information. Note: When updating point values (via a value edit in CygNet Explorer, using the TextImport EIE, or via a SetPoint object) all changes are pushed through to the associated CVS (UIS, HSS, and OPCIS). In the case of the OPCIS, you cannot do a text import or a setpoint to an OPCIS point if an external OPC server ID is configured (in the External ID field of the Point reference page of the PNT Editor) because any update is routed back through the external OPC server. This makes it impossible to backfill historical data for a tag that "belongs" to an OPC server.	Blank

Property

Description

Default Value

CygNet point reference

Type

Specifies the type of the reference point. Option is any entry from the CMPNTREF table: for example, Group Averager, Group SYFACINFO Rollup, Group Totalizer, OPC Group Facility, SvcMon Timer Ref Point.

Blank

Site

The Site of the reference point.

Blank

Service

The Service of the reference point.

Blank

Point ID

The Point ID of the reference point.

Blank

Long point ID

The Long Point ID of the reference point.

Blank

Choose point…

Click Choose Point to select a reference point.

External point

Type

The type of external point type. Option is any entry from the CMEXTTYP table with 10 characters maximum.

Blank

External ID

Free-form text up to 256 characters.

This property can be used for linking points to an external OPC server. The format is:

server_name=<server>; machine_name=<machine>

See OPCIS Points, OPCIS Data Points, and OPCIS Groups for more information.

Note: When updating point values (via a value edit in CygNet Explorer, using the TextImport EIE, or via a SetPoint object) all changes are pushed through to the associated CVS (UIS, HSS, and OPCIS). In the case of the OPCIS, you cannot do a text import or a setpoint to an OPCIS point if an external OPC server ID is configured (in the External ID field of the Point reference page of the PNT Editor) because any update is routed back through the external OPC server. This makes it impossible to backfill historical data for a tag that "belongs" to an OPC server.

Blank