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Contents
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National Instruments Corporation
ix
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
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
Historical Data Logging and Extraction
What Is Citadel?................................................................................................................... 6-1
How Do You Log Historical Data? ..................................................................................... 6-2
How Do You Configure Historical Logging? ....................................................... 6-3
Historical Data VIs ................................................................................................ 6-4
Historical Trend Viewer (HTV) ............................................................................ 6-9
a Specific Point in Time? ................................................................... 6-12