What is the difference between DA and HDA? I have started programming and looks like all the functionality is available in both. PI OPC DA can fetch history data if requested like HDA.
What OPC DA / HDA servers are you referring to?
In case you are asking for PI OPC DA and PI OPC HDA servers, please be ensured that the PI OPC DA server will only provide you with snapshot values (most recent event).
I was informed by tech support that PI-OPC DA server has all the functions even to colleect archive data like HDA. I wanted to confirm. TKS
PI OPC DA/HDA Server install kit installs 2 OPC Server services PI OPC DA Server and PI OPC HDA Server. If PI OPC DA Server would support Historical Data Access (HDA), what would be the use for PI OPC HDA Server?
I understand exactly as u said and asked tech support, i was told that for now there is just the name difference between PI OPC DA and HDA but inside both contain same functions. Is it the case?
I can only assume a misunderstanding. That's why I've asked you by email for the reference number of your case at OSIsoft Technical Support. Please feel free to respond to my email. Until then: PI OPC DA Server and PI OPC HDA Server are 2 separate products, executables bundled / shipped within a single setup kit.
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