in the upper right hand corner of the dialog box, then
click the item you want information about. Introduction
An analog object provides numerous features and possibilities. This topic provides an overview of the analog-specific characteristics. For a definition of an analog object, click See Also.
Type-specific properties
The analog-specific properties can be viewed on the Analog tab of the object properties dialog box. The most important analog properties are:
|
Property |
Description |
|
Alarm limits
|
An analog object has two built-in sets of alarm limits expressing varying degrees of seriousness that may be used if relevant - or disabled if not required. Alarm supervision is enabled simply by checking the box next to the desired limit. When enabled, an alarm is generated and shown in the Alarm List during supervision when the actual value exceeds or goes below the limit. |
|
Actual value |
The actual value is, of course, updated dynamically during supervision; the value defined in IGSS Definition is overwritten as soon as the data collection is started. |
|
Set point |
The set point is the desired process value, the value according to which the process value is calibrated. |
For an explanation of the remaining items in the dialog box, click the
in the upper right hand corner of the dialog box, then
click the item you want information about.
Beside the type-specific properties a number of properties which are common to all object types are available from the other tabs of the object properties dialog box.
Graphical display of analog objects
An analog object can be represented in multiple ways on a process diagram. Click here for details.
Using analog templates
If you have a number of very similar analog objects sharing multiple properties, you will find it useful to use an analog template. You will thus eliminate the need of entering the same information for many objects and obtain a better consistency in your configuration.
Scaling analog objects
By using the special scaling object, you can convert I/O values simply by connecting it to the analog object whose values you want to convert.
A typical example is to convert °C to °F. The corresponding scaling object is defined once and can then be reused as many times as needed for both analog and table objects.
Connecting analog objects to other object types
To obtain more advanced functionality, you can connect an analog object to another object type.