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OPC SpecificationsOPC Data Access (OPC DA) 3.00 SpecificationOPC Data Access (DA) is used to move real-time data from PLCs, DCSs, and other control devices to HMIs and other display clients.  Learn more.
OPC Data Access (OPC DA) 2.05a SpecificationOPC Data Access (DA) is used to move real-time data from PLCs, DCSs, and other control devices to HMIs and other display clients. Learn more.
OPC Alarms & Events (OPC AE) 1.10 SpecificationThe OPC Alarms & Events specification provides alarm and event notifications on demand (in contrast to the continuous data flow of Data Access). These include process alarms, operator actions, informational messages, and tracking/auditing messages. Learn more.
OPC Data eXchange (OPC DX) 1.00 SpecificationThis specification takes us from client/server to server-to-server with communication across Ethernet fieldbus networks. This provides multi-vendor interoperability. Learn more.
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