OPC server settings
- Last UpdatedMay 22, 2025
- 2 minute read
OPC Server Node Name
The name or IP address of the OPC server node (/SERVER=node::name). Leave blank or set to "localhost" (case insensitive) if PI Interface for OPC DA and OPC server are on same node. If anything else is used for the node name, the interface will treat the OPC server as remote. This can impact certain OPC servers that may refuse "remote" connection attempts.
OPC Server Name
Registered name of the OPC server on the OPC server node.
Force v1.0a Protocol
By default, the interface tries to connect to the OPC server using the v2.0 OPC Data Access specification (/vn=2). If the attempt fails, it uses the v1.0a protocol. To force the interface to use only the v1.0a OPC Data Access specification, enable this option.
Timestamps
PI Server Provides All Timestamps: The OPC interface provides a time stamp when the data is received (/ts=N).
Original Timestamps Adjusted for PI Server: The OPC interface uses the data time stamps provided by the OPC server and accounts for the offset between the OPC server and the PI Data Archive node (/ts=Y).
Original Timestamps for Advise tags Only: The OPC server provides time stamps only for advise tags, and the interface accounts for the offset between the OPC server and the Data Archive node. For all other tags, the interface provides a time stamp when the data is received (/ts=A).
Original Timestamps: The OPC server provides the time stamps for all data, and the interface will not apply any time offset to these values. Data loss will occur if a value is received from OPC with timestamp 10 minutes or more past current time of the Data Archive node. (/ts=U).
Questionable Quality
Store Quality Data Only: If data has other than GOOD quality, store the quality information rather than the value (/sq=Y).
Store Value Flagged Questionable: Store the value and flag as questionable (/sq=N, default).
Store Value Only: The interface treats questionable quality as good. (/sq=I).
Bad quality data is different than questionable quality data, and is always stored as a system digital state.