Version: 8.1

system.opchda

OPC HDA Functions

The following functions give you access to interact with the HDA types of OPC servers.

For more information on OPC HDA, see the OPC HDA properties section of the Tag History Providers page.

If you are looking for an OPC HDA server to use, various OPC HDA server tools are available, such as Matrikon and Kepware.

Performs a browse at the given root.

Will query the server for aggregates that it supports.

Queries the given server for the item attributes that are available with system.opchda.readAttributes.

Returns a list of the OPC-HDA servers configured on the system.

Insert values on the OPC-HDA server.

Will insert values on the OPC-HDA server, or replace them if they already exist.

Checks to see if the specified OPC-HDA server is defined, enabled, and connected.

Reads the specified attributes for the given item over a time range.

Reads processed values from the OPC-HDA server.

Reads raw values from the OPC-HDA server.

Replaces values on the OPC-HDA server if the given item ID exists.