Rockwell Automation FactoryTalk Historian SE 3.0 UniInt Interface User Guide - Manual (Page 12)

Interface Startup Parameters
6
Parameter Description
Point Loading 0x0040
Time Functions 0x0400
Digital State Caching 0x2000
/DisableCounters
Optional
Windows Performance counters are enabled by default.
Counters can be disabled by specifying
/disablecounters on the command-line.
/ec
or
/ec=#
Optional
The first instance of the /ec parameter on the command-line
is used to specify a counter number, # , for an I/O Rate point.
If # is not specified, then the default event counter is 1. Also, if
the /ec parameter is not specified at all, there is still a default
event counter of 1 associated with the interface. If there is an
I/O Rate point that is associated with an event counter of 1,
each copy of the interface that is running without
/ec=#
explicitly defined will write to the same I/O Rate point. This
means that one should either explicitly define an event
counter other than 1 for each copy of the interface or one
should not associate any I/O Rate points with event counter 1.
Configuration of I/O Rate points is discussed in the section I/O
Rate Points (page 25)
For interfaces that run on Windows nodes, subsequent
instances of the
/ec parameter may be used by specific
interfaces to keep track of various input or output operations.
One must consult the interface-specific documentation to see
whether subsequent instances of the
/ec parameter have
any effect. Subsequent instances of the /ec parameter can
be of the form /ec*, where * is any ASCII character
sequence. For example, /ecinput=10 , /ecoutput=11 ,
and /ec=12 are legitimate choices for the second, third, and
fourth event counter strings.
/f=SS
or
/f=SS,SS
or
/f=HH:MM:SS
or
/f=HH:MM:SS,hh:mm:ss
Required for reading scan-
based 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. There is no limit to the
number of scan classes that can be defined. 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
Historian Point attribute. For example, all Historian 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