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OPC is an open industry standard device interface that provides interoperability between disparate field devices, automation control systems, and business systems. OPC-DA is based on ActiveX, OLE, COM and Distributed COM technologies. You can find more details at the OPC Foundation Web site, https://opcfoundation.org/, or the NI OPC Web site. The following tables give details about NI products and OPC compatibility.
| OPC-DA 1.0 | OPC-DA 2.0 | OPC-DA 3.0 | |
| DataSocket API | √ | √ | X |
| Lookout (5.1) | √ | √ | X |
| Lookout (6.2 and higher) | √ | √ | √ |
| Shared Variable OPC Client I/O Server (LabVIEW DSC 8x) | X | √ | √ |
| OPC 1.0A | OPC 2.0 | OPC-DA 3.0 | |
| NI-DAQ 6.8 | √ | X | X |
| NI-DAQ 6.9 | √ | √ | X |
| NI-DAQmx | X | √ | √ |
| LabVIEW DSC Module 6.x and 7.x | √ | √ | X |
| Lookout 6.2+ | √ | √ | √ |
| FieldPoint 2.0.2 (and higher) | X | √ | X |
| NI-FBUS 2.3.5 | √ | X | X |
| Shared Variable Engine with DSC 8 Module (and higher) | X | √ | √ |
Note: OPC Unified Architecture (UA) servers/clients are not compatible with OPC-DA interfaces.