WWHistorian - Ampla
Integration with OPC HDA
Arthur Almeida
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Summary
> Test Scenario
> Softwares
> 1st Test – Shutdown Historian Server
> 2nd Test – Broken Network Connection between InTouch and WWHistorian
> 3rd Test – Shutdown Ampla Server
> 4th Test – Broken Connection between Ampla and WWHistorian Server
> Results
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Test Scenario
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OPC HDA Server
OPC Client
OPC Server
Store
Forward
Intouch Server
Protocolo OPC-HDA
Protocolo Suitelink
Ampla
WW HISTORIAN
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Softwares
> Virtual Machines
> Windows Server 2008R2
> SQL Server 2012 SP1
> Wonderware Intouch 2014 R2
> Wonderware Historian 2014 R2
> Integration Objects OPCHDAServer for InSQL 1.3.0
> Ampla 6.1 MR2
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1st Test – Shutdown Historian Server
> When WWHistorian server is offline (shutdown) Ampla recognizes error and does not
capture the data.
> Connecting the WWHistorian server again, Ampla reads the updated status “good” of
HDA Server and captures the data properly. But considering data backfilling for the
period communication was off, it is done the wrong way: first, the value is kept frozen
for the whole period. After some minutes, values are correctly updated (not frozen
anymore). But at this point, as the status of the frozen value was “good”, Ampla
already read it and considered it to write into its database and also for calculations,
and it does not consider the updated values.
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2nd Test – Broken Network Connection between
Client and WWHistorian
> Ampla does not identify any error connection in Historian Server, so it captures the
last value written in WWHistorian.
> When broken connection is restablished, there is no backfilling in Ampla history
values.
> This happens because OPC HDA Integration reads the status of WWHistorian Server
and not the data sources configured in WWHistorian. So if one data source shows
problem but WWHistorian keeps working, Ampla doesn't read any status if error.
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3rd Test – Shutdown Ampla Server
> When Ampla server is shutdown and returns later, Ampla reads the data and make fill
back with no problems - with proper data.
> The backfilling period that Ampla considers is the same as configured in
SampleStream at Ampla.config file.
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4th Test – Broken Connection between Ampla and
WWHistorian Server
> When we break the network connection between WWHistorian and Ampla, OPC HDA
Client shows error and Ampla stops capturing the data. Restoring the network
connection, Ampla collects all data from the period connection was broken.
> It is important to highlight that, if the period of broken connection is longer than the
period defined in Ampla’s SampleStream, Ampla won’t fill back the difference between
those periods.
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Results
OPC HDA Server
OPC Client
OPC Server
Store
Forward
Intouch Server
Protocolo OPC-HDA
Protocolo Suitelink
Ampla
WW HISTORIAN
Ampla will retrieve data correctly when fails on this point
Ampla will NOT retrieve data correctly when fails on this point. Data on WWHistorian and
Ampla will be different.
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