Rockwell-automation FactoryTalk Historian SE 4.0 Live Data Interface U Manual de usuario descargar pdf (Pagina 32)

Chapter 5 Point Configuration

32 Rockwell Automation Publication HSELD-UM024A-EN-E–September 2013

EVENT='triggertagname' event_condition

where

triggertagname is enclosed in single quotes and, if specified,

the

event_condition immediately follows the triggertagname. If

the

event_condition is not specified then it defaults to Anychange.

The update rate for event item groups is also related to the scan class,

so the server will be asked to update its cache once every scan period

for every event tag defined. This is probably faster or slower than

necessary. You must set the Loc4 attribute to make event tags work

well. The Location 5 attribute should have the value 1 for Event

tags.

Typical example:

Tag ExDesc Instrument Tag Loc1 Loc2 Loc3 Loc4 Loc5

PM1_Temp.PV EVENT='PM1_Trigger ItemID1 1 0 0 2 1

PM1_Rate.PV EVENT='PM1_Trigger ItemID2 1 0 0 3 1

In this case, PM1_Trigger are tags that are updated by this interface,

by another interface, or by manual entry. When a PM1_Trigger gets

a new event in the PI snapshot, the interface will send data for both

PM1_Temp.PV and PM1_Rate.PV to the PI server.

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Rockwell-automation FactoryTalk Historian SE 4.0 Live Data Interface U Manual de usuario Pagina 32