What is OPC HDA?

Q&A ForumCategory: QuestionsWhat is OPC HDA?
Guest asked 4 years ago

What is OPC HDA?  How does it differ from OPC?

1 Answers
Guest Staff answered 4 years ago

There are a number of OPC variants. The common ones are:

  • OPC DA: OPC Data Access
  • OPC AE: OPC Alarm and Events
  • OPC UA: OPC Unified Architecture
  • OPC HDA: OPC Historical Data Access

OPC HDA is used to view or collect archived process data in raw, interpolated, or aggregate forms. It differs from OPC DA by not showing real-time data.

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