opc-OpcPointManager

Use the OpcPointManager to add, edit, and access Opc proxy points under the OpcPointDeviceExt extension of a selected OpcDaClient, or in an OpcPointFolder. The OpcPointManager is the default view on both of those components. To view, double-click the OpcPointDeviceExt extension or OpcPointFolder, or right-click and select Views->Opc Point Manager.

As in other point managers, there is a Discovered table (if in Learn mode) and a Database table. For additional details, see Opc Point Manager.

Discovered table

The Discovered table in the OpcPointManager view has the following available columns:

Name

Name of the OPC folder or data item.
Id

The ID of the data item on the OPC server, including full hierarchical folder path.
Data Type

The (Windows) OPC datatype of an item, as provided by the server—for example: Vt Real4. See Supported OPC data types for related information.
Mode

Either RO (read-only) or RW (read-writable).
Facets

Reflect default facets for a data item, including its description.

Database table

The Database table in the OpcPointManager view has the following available columns:

Name

Niagara name of the Opc component, often left as the (discovered) folder or data item name.
Type

Niagara type of component, as either an Opc Point Folder (for a folder) or a type of control point if an Opc proxy point (for example, Boolean Point, Boolean Writable, Numeric Point, and so on).
To String

Last read value of a data item.
Id

The ID of the data item on the OPC server.
Fault Cause

String describing the cause of the point status fault, if any.
Opc Quality

Server-supplied status of a data item value, as either: Good, Bad, or Uncertain.
Opc Quality Subcode

Server-supplied status subcodes (numeric subcodes indicate vendor information), as either:

Bad:
- Non Specific
- Configuration Error
- Not Connected
- Device Failure
- Sensor Failure
- Last Known Value (Comm has failed, however the last known value is available.)
- Comm Failure (No last known value.)
- Out of Service
- Waiting for Initial Data
Uncertain:
- Non Specific
- Last Usable Value (Whatever was writing this value has stopped doing so.)
- Sensor Not Accurate
- Engineering Units Exceeded
- Sub Normal (Value is derived from multiple sources, with less than required number of good sources)
Good:
- Non Specific
- Local Override
Server Handle

Numeric server handle used to refer to this data item. A handle of 0 means the item has not been registered with the server.
By default, remaining columns (listed below) are not enabled to display in the Database table. However, you can use the table controls to show/hide whichever columns needed.
Conversion

Niagara conversion type used by the Opc proxy extension, which is typically Default.
Tuning Policy Name

Name of the Niagara OpcTuningPolicy that the proxy point is assigned to.
Data Type

The (Windows) OPC datatype of an item, as provided by the server—for example: Vt Real4. See Supported OPC data types for related information.
Enabled

Reflects whether proxy point is enabled (true) or disabled (false).
Facets

Reflect the facets in use by the proxy point.
Device Facets

Reflects the read-only device facets used in the point’s proxy extension.
Path

Reflects the station path for the Opc component, relative to the station’s root.
Mode

Either RO (read-only) or RW (read-writable).
Opc Read Time

Reflects the server timestamp of the current value.
Read Value

Reflects current read value in point’s OpcProxyExt.
Write Value

Reflects current write value (if any) in point’s OpcProxyExt..
Opc Limit

Reflects the Opc limit for the data item.