Rockwell Automation FactoryTalk Historian SE 3.0 Live Data Interface User Guide - Manual (Page 45)

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Startup Command File
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39
Parameter Description
/f=SS
or
/f=SS,SS
or
/f=HH:MM:SS
or
/f=HH:MM:SS,hh:mm
:ss
Required for reading scanbased inputs.
The /f parameter defines the time period between scans in terms of
hours (HH), minutes (MM), and seconds (SS). The scans can be
scheduled to occur at discrete moments in time with an optional time
offset specified in terms of hours (hh), minutes (mm), and seconds
(ss). If HH and MM are omitted, then the time period that is specified
is assumed to be in seconds.
Each instance of the /f parameter on the command-line defines a
scan class for the interface. The first occurrence of the /f parameter
on the command line defines the first scan class of the interface; the
second occurrence defines the second scan class, and so on. Historian
points are associated with a particular scan class via the Location4
point attribute. For example, all points that have Location4 set to 1
will receive input values at the frequency defined by the first scan
class.
Similarly, all points that have Location4 set to 2 will receive input
values at the frequency specified by the second scan class, and so on.
Two scan classes are defined in the following example:
/f=00:01:00,00:00:05 /f=00:00:07
or, equivalently:
/f=60,5 /f=7
The first scan class has a scanning frequency of 1 minute with an
offset of 5 seconds, and the second scan class has a scanning
frequency of 7 seconds with no offset.
When no offset is specified, the scan class will be scheduled for
immediate execution. That is, the interface will not wait for a well-
defined moment in time before scanning when no offset is specified.
One can also specify sub-second scan classes on the command line
such as:
/f=0.5 /f=0.1
Optional parameters:
Parameter Description
/PISDK=# Default = 0.
The /pisdk parameter can be used to enable or disable the PI SDK.
 Use /pisdk=1 to enable the PI SDK.
 Use /pisdk=0 to disable the PI SDK.