OPC Client - HDA

General

Driver	Protocol	Protocol standard / version	Official protocol certification	Included in Base License Package?	Additional Licensing Requirements	License Key (Code Meter)	Operating System
OPC HDA Client	OPC Historical Data Access	OPC HDA Spezifikation Version 1.20	❌	✔	-	OPC Client	Windows

Network

Driver	Encrypted communication to periphery device	Client Or Server / TCP or UDP	Default Port	Firewall Direction
OPC HDA Client	❌	COM(local) or DCOM(with Server/Client on different hosts	-	-

Configuration Details

Driver	Recommended/technical limit of connections per driver	Multiple driver instances	Redundant network	Redundant devices	Special hardware requirements
OPC HDA Client	32	✔	❌	❌	❌

Communication

Driver	Polling	Poll on use	Single query	Unsolicited communication	Driver redundancy: Only active driver polls	Buffering1
OPC HDA Client	❌	❌	Historical queries must be triggered on demand	❌	N/A	❌

Engineering

Driver	Direct browsing of configuration/address data from connected devices	Import functionality of configuration/address data from external tools	Deletion of internal connection DP is supported
OPC HDA Client	✔	❌	❌

Special Telegrams

Driver	Native alarm transfer from connected devices / PLCs	Connection establishment without active address
OPC HDA Client	❌	N/A

Timestamps and Synchronization

Driver	Timestamp transfer from periphery device	Time synchronization (WinCC OA to PLC)
OPC HDA Client	✔	❌