National Instruments BridgeVIEW user manual - page 6

Contents
© National Instruments Corporation vii BridgeVIEW User Manual
What Is the Tag Configuration Editor?................................................................................3-3
How Do You Create a Tag?..................................................................................3-5
How Do You Edit a Tag?......................................................................................3-5
How Do You Delete a Tag?..................................................................................3-5
What are Network Tags?.......................................................................................3-6
How Do You Add Network Tags?........................................................................3-7
How Do You Set Default Values for Tag Configuration Fields? .........................3-7
How Do You Use Spreadsheet Files for Tag Configuration?...............................3-8
How Do You Configure Tags?..........................................................................................3-10
Data Type ............................................................................................................3-10
Analog Tags..........................................................................................3-10
Discrete Tags.........................................................................................3-10
Bit Array Tags.......................................................................................3-10
String Tags............................................................................................3-11
General ................................................................................................................3-11
Connection...........................................................................................................3-12
I/O Group Configuration.......................................................................3-14
I/O Group Configuration Options...........................................3-15
Server Configuration Options.................................................3-16
Item Configuration................................................................................3-18
Item Configuration Options—Con fig uring
Item Names..........................................................................3-18
Item Configuration Options—Con fig uring
Item Resources.....................................................................3-18
What Is a Memory Tag?........................................................................3-19
When Should You Use a Memory Tag?.................................3-19
How Do You Automatically Generate Tags
from Server Information? ..................................................................3-20
How Do You Connect a Tag to an OPC Server?..................................3-21
How Do You Connect a Tag to a DDE Server? ...................................3-21
How Do You Define a Group of Tags for Alarming? ..........................3-21
Operations............................................................................................................3-22
What Is Deadband?...............................................................................3-24
How Do You Use Deadband to Increase Engine Throughput? ............3-24
How Do You Configure a Tag to Log Its Data or Events?................... 3-25
How Do You Set Initial Tag Value at Startup? ....................................3-25
Scaling.................................................................................................................3-25
Analog Tags..........................................................................................3-27
Example—Linear Scaling ......................................................3-27
Example—Square Root Scaling ............................................3-28
How Do You Assign Units to an Analog Tag?.....................................3-28
Discrete Tags.........................................................................................3-28
Bit Array Tags.......................................................................................3-29