National Instruments BridgeVIEW 用户手册

Chapter 1 Introduction

BridgeVIEW User Manual 1-6 © National Instruments Corporation

Connection

Connection includes the following tag attributes: 

• Access rights (input only, output only, Input/Output, or memory)

•

Server  name

• I/O group name

• Item name

• Access path (for OPC servers)

Scaling

Scaling controls the type of scaling to perform on a tag when 
communicating with a device server, and the expected engineering 
range and units for the tag.

Operations

You can specify how the BridgeVIEW Engine updates the 

 when it logs the tag data to disk, if it logs events 

associated with the tag, and what value exists in the database at startup. 
The operations that can be performed on a tag are as follows:

• Updating the Real-Time Database 

• Historical logging 

• Event logging 

• Event printing

Alarms

 is an abnormal process condition. For example, an analog 

tag can be configured to be in a HI alarm state when its value is greater 
than 25. You can set alarm limits for a tag in the Tag Configuration Editor. 
Each alarm limit has a priority associated with it to determine the severity 
of the alarm.