What is an analog object?

Definition

An analog type in the IGSS system is used to represent a process component that can take on any value within a specified range.

Use

The following examples show what an analog object may be used for:

a level gauge measuring the contents of a tank in litres. When the tank is empty, it contains 0 litres and when full it holds 520 litres. This would mean that the analog object would have a specified range of 0 to, for example, 550 litres.
a temperature gauge measuring room temperature within the limits -5 to 35 °C.

How to define an analog object

Click here $images\CHICLET.gif$ to learn how to define an analog object.

Graphical display on diagrams

Apart from using the standard symbols for analog objects included in the default symbol file, Symbols.v20, that comes with IGSS, you can show analog objects as a bar display or a circular display, where appropriate. A bar display may be useful for showing the contents of a tank and a circular display for showing a disk capacity monitor. Click here for further information.

How to view properties

Once the analog object is defined and its symbol is placed on a process diagram, you can view its properties in a number of different ways.

By double-clicking the symbol representing the object
By right-clicking the symbol and then selecting Properties in the pop-up menu.
By selecting the symbol and then selecting Edit ® Object Properties.

The properties can be changed at any time.