Rockwell Automation FactoryTalk Historian SE 3.0 Live Data Interface User Guide - Manual (Page 48)

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FactoryTalk Historian Live Data Interface User Guide
42
Setting File
For more flexibility, the FTLD interface can use an INI format file to
configure interface information. This format file does not install with the
FTLD interface, but you can create the file manually. It should be named
FTLDInt.ini and it must be created in the same path as the FTLDInt.exe file
and the FTLDIntCtl.dll file.
The following is a sample setting file.
[FTLDIntSetting]
OnceMaxUnsolEvents=4
ScanClassToUpdateRate=1
PIOrFTLDTimestamp=0
FTLDResponseInterval=5000
Review the following for additional information:
OnceMaxUnsolEvents The OnceMaxUnsolEvents key specifies the maximum number
of unsolicited events that the FTLD Interface can process in
each loop for each advised tag. The default value for
OnceMaxUnsolEvents key is 4. That is, the interface can
process 4 events for each advised tag when the interface
collects data.
ScanClassToUpdateRate For polled points, the FTLD interface calculates the update
rate from its scan time. The update rate is used while adding
an item to the FTLD server.
The algorithm is "Update Rate = Scan Time /
ScanClassToUpdateRate"
For example, if a point has a 1-second scan period and the
ScanClassToUpdateRate is 2, the FTLD Interface will use 500
ms as the update rate.
PIOrFTLDTimestamp The PIOrFTLDTimestamp key specifies which time stamp will
be used to determine when to send data to the FactoryTalk
Historian Server. PIOrFTLDTimestamp=0 means the
FactoryTalk Historian server time stamp is used, and 1 means
the FTLD server time stamp is used. This setting is similar to
the /TSofPIorFT command-line parameter. See
Command-line
Parameters (page 37) for more information.