Access path
- Last UpdatedMay 22, 2025
- 1 minute read
In OPC items, the access path suggests how the server can access the data. The OPC standard states that it is valid for servers to require path information to access a value, but not for them to require that it be sent in the access path field. According to the standard, the OPC server can ignore it, but some non-compliant OPC servers require the access path.
For example, RSLinx requires path information in the access path or as part of the ItemID, in the following format: [accesspath]itemid.
If your OPC server requires an access path, contact your OPC server vendor to determine how best to configure the server with PI Interface for OPC DA.