Niagara Release 2.3
Revised: August 15, 2002Niagara
Browser Access GuideChapter 5 Log Charts
About Log Data
5–2About Log Data
Log data is system information stored overtime by logs (log objects. Each log is linked to another point (object)
in the system, and records the changing values for that specific point. Each log record (value recorded in a log) includes a date and timestamp.
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There are several types of logs, corresponding to the type of linked object whose value it is recording.
•An analog log is the most commonly used log.
It records an analog “floating-point” value such as a temperature or humidity. Configuration is usually to record upon some repeating interval, for example, every 30 minutes.
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