Rockwell-automation FactoryTalk Historian SE 3.0 UniInt Interface User Manuale Utente Scaricare il pdf (Pagina 12)

Interface Startup Parameters

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

/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

/f=SS,SS

/f=HH:MM:SS

/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

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 107 108

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Rockwell-automation FactoryTalk Historian SE 3.0 UniInt Interface User Manuale Utente Pagina 12

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