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Chapter 8
Managing History, Events, and Alarms
8.1
About this chapter
This chapter discusses the following topics:
•
The historical databases
•
History point configuration
•
Configuring history for audit trail requirements
•
Viewing, saving, printing and exporting history, event, and alarm logs
•
Plotting history data
8.2
Overview
The Model 3711 contains two historical databases: the history database and the event and alarm
database.
8.2.1
History
The Model 3711 automatically logs parameter values for specific parameters which have been defined
as "history points." History point data is recorded in either the standard or the extended history
database:
•
The standard history database logs current values for all specified parameters, at three
intervals: minute, hour, and day. A min/max entry is also logged daily, at the configured
contract hour (see Section 3.4).
Note: FSTs can be used to change the logging interval for the standard database. See Chapter 11.
•
The extended history database logs current values for all specified parameters, at a
user-specified interval.
Eleven standard history points are predefined. Additional history points can be configured as required.
History point data can be stored for up to one month.
8.2.2
Events and alarms
The Model 3711 automatically logs all events to the event log. An event is any occurrence in one of
the following categories:
•
Configuration
•
Calibration
•
Power cycle
•
All warm starts and cold starts
Alarms may or may not be logged, depending on configuration.
Configuration and Use Manual
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Troubleshooting
