CDA ci860 Specifications Page 420

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Integrating OPC Servers into 800xA
420 3BDS011222-510 B
Accessing the 800xA OPC HDA Server
OPC HDA Server Support in the 800xA system enables you to read, write or
subscribe to history logs from a third party OPC HDA client.
The status of the server is checked by calling the method GetHistorianStatus on
IOPCHDA_Server. The client should wait for the return code OPCHDA_UP before
calling the other methods.
OPC HDA Program Identities
The Program Identity for the System 800xA OPC HDA Server to be used by third
party OPC HDA clients is ABB.AdvHtHistorySrv (local server). There will be a
new process every time a client connection is established. Use the DCOMCNFG
tool to set the DCOM security setting, see DCOM Security Settings for OPC on
page 457.
OPC HDA Compliancy
The 800xA System OPC HDA is compliant with the OPC Historical Data Access
Specification Version 1.20 with one deviation.
IOPCHDA_Server: CreateBrowse - filters are only applied on item IDs.
Integrating OPC Servers into 800xA
As stated in the previous chapter 800xA OPC functionality consists of two main
functions, OPC Support and OPC Connect. This chapter deals with OPC Connect.
OPC Connect enables OPC Servers to be connected and integrated into 800xA so
that 800xA can read and write data from/to underlaying OPC Servers.
800xA OPC Connect is typically the means for 800xA to integrate OPC enabled
hardware components like DCS controllers, PLCs and field devices.
800xA OPC Connect supports interfaces for OPC Data Access and OPC Alarm and
Event.
800xA OPC Connect does not include support for integration of OPC HDA
servers into 800xA.
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