National Instruments BridgeVIEW - Manual (Page 8)

Contents
© National Instruments Corporation ix BridgeVIEW User Manual
General Principles of G HMI Programming...................................................................... 4-25
How Do You Implement Event-Driven Programming in G?.............................. 4-25
How Do You Implement Polled Programming in G? ......................................... 4-27
How Do You Initialize and Shut Down Multiple-Loop Applications?............... 4-28
How Do You Display Real-Time Trends? .......................................................... 4-29
How Can You Use Tag Attributes to Configure HMI Indicator
Attributes Programmatically? .......................................................................... 4-31
Chapter 5
Alarms and Events
What are Alarms and Events?.............................................................................................. 5-1
Alarm States .......................................................................................................... 5-1
Alarm Limit ........................................................................................................... 5-1
Alarm Priority........................................................................................................ 5-2
Alarm Summary .................................................................................................... 5-2
Event History......................................................................................................... 5-2
How Do You Display Alarm Summary Information?......................................................... 5-2
How Do You Display Event History Information? ............................................................. 5-6
How Do You Acknowledge Alarms? ................................................................................. 5-6
How Do You Configure Logging and Printing of Alarms and Events? ............................ 5-10
How Do You Log Alarms and Events? ............................................................... 5-12
How Do You Print Alarms and Events?.............................................................. 5-13
How Do You View Alarms and Events?............................................................. 5-14
Chapter 6
Historical Data Logging and Extraction
What Is a Trend?.................................................................................................................. 6-1
Real-Time Trend ................................................................................................... 6-1
Historical Trend.....................................................................................................6-1
What Is Citadel?................................................................................................................... 6-1
How Do You Log Historical Data? ..................................................................................... 6-2
How Do You Configure Historical Logging? ....................................................... 6-3
How Do You Extract and View Data from Historical Log Files?.......................................6-4
Historical Data VIs ................................................................................................ 6-4
Historical Trend Viewer (HTV) ............................................................................ 6-9
How Do You Select the Tags to Display? ............................................ 6-10
How Do You Change the Time Axis? .................................................. 6-10
Panning Buttons......................................................................6-11
Manual Changes .....................................................................6-11
How Do You Change the Timespan of Data Displayed? ..................... 6-12
How Do You View the Value of a Tag at
a Specific Point in Time? ................................................................... 6-12