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
rangeand units for the tag.
Operations
You can specify how the BridgeVIEW Engine updates the Real-Time
Database (RTDB), 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.
Theoperations that can be performed on a tag are as follows:
• Updating the Real-Time Database
• Historical logging
• Event logging
• Event printing
Alarms
An alarm is an abnormal process condition. For example, an analog
tagcanbe configured to be in a HI alarm state when its value is greater
than25.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.