Using the Object Historian

Introduction

This topic serves to give you an overview of the Object Historian functionality. For step-by-step procedures, click here and choose the relevant one.

Example

The functionality is best illustrated with an example. The dialogue below shows the LOG data for 24 hours for the selected objects.

$images\Object_Historian_-_log.gif$

Select objects for inspection

The first step is to choose the objects you want to inspect. This can be done in two ways:

Lasso the objects on a process diagram, then select Edit ® Object Historian.
Select Edit ® Object Historian, then browse through the configuration to find the objects.

The selected objects appear in the list with the text "Will be checked for events".

Define the time period

By default, the Object Historian goes back one hour but you can choose any start and end time in the Time interval area.

But remember that you must have the corresponding data files in the configuration's report folder. The lifetime of the different data files may be limited as defined in the System Configuration program on the Files tab. As an example, the lifetime for .log files is set to 24 hours by default. So if you don't get any data in the list, this may be the reason.

Choosing the event types

You can now choose between four different event types: LOG, BCL, Alarm data or user login/logout information. Any combination of the four types is valid.

Once the relevant types are selected, simply click the Query data button.

Printing or exporting data

Once the data is displayed in the list, you can print the data or export it to a .csv file for further processing.

What's This? Help

When you work with the Object Historian, you can always click the $images\ICO_HELP.gif$ in the upper right corner of the dialogue, then click the item you want information about.