Manufacturing, explained

What Is OPC DA?

OPC Data Access is a classic OPC standard for exchanging live industrial values, timestamps and quality information.

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OPC Data Access (OPC DA) is an OPC Classic specification for exchanging current industrial process values between a server and client, including timestamps and quality information. It uses Microsoft COM/DCOM technology and is often found in older control and data-collection systems. OPC UA is a newer, platform-independent architecture with a broader information model and security framework. A site moving from OPC DA to OPC UA should check the actual tags, data meaning, access rights and gateway behaviour.

Related: OPC UA · OPC Foundation: OPC Classic.

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