Rockwell-automation FactoryTalk Historian SE 4.0 Live Data Interface U Manual de usuario descargar pdf (Pagina 31)

Point Configuration Chapter 5

Rockwell Automation Publication HSELD-UM024A-EN-E–September 2013 31

• Scan Class 4 has a scan period of 5 seconds, with an offset of 1

second.

Polled tags are read once every scan period. To set up a polled tag, set

Location1 to match the /ID parameter, Location3=0, and

Location4=scanclass#.

For example:

Tag InstrumentTag Loc1 Loc2 Loc3 Loc4 Loc5

FiveSec.PV ItemID1 1 0 0 1 0

OneMin.PV ItemID2 1 0 0 2 0

NinetyMin.PV ItemID3 1 0 0 3 0

For Advise tags, the interface asks the FTLD server to send data

when it changes, and how often it should read the device to see if

there is a new value.

For example:

Tag InstrumentTag Loc1 Loc2 Loc3 Loc4 Loc5

AdvFiveSecs.PV ItemID1 1 0 1 1 0

AdvOneMin.PV ItemID2 1 0 1 2 0

AdvNinetyMins.PV ItemID3 1 0 1 3 0

Event tags are read when the triggering event occurs. An event

happens when the FactoryTalk Historian snapshot receives a value

for the trigger tag. It may have the same time stamp and quality and

value as the last event so the snapshot value for that trigger may seem

the same, but the act of receiving a value for the trigger tag causes the

interface to receive a notification that the trigger has been updated.

To configure triggered input tags, specify the name of the trigger tag

in the ExDesc field using the following format:

Polled Tags

Advise Tags

Event Tags

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 57 58

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Rockwell-automation FactoryTalk Historian SE 4.0 Live Data Interface U Manual de usuario Pagina 31