Siemens Building Technologies, Inc.
4-1
Landis Division
4444
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Chapter 4 describes the Open Processor point database, including point definition
information, dynamic point information, point database structure, point addresses, and slopes
and intercepts. The following topics are included in Chapter 4:
x
What is a Point Database?
x
Types of Logical Points
x
Virtual Points
x
Local Points
x
Point Characteristics
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Point Type Attributes
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BCU Mapping/Metapoints
x
BACnet
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Point Database Guidelines
Most tasks that the Open Processor performs involve either collecting data from Trane
equipment controllers or commanding them. Other tasks require communication and
calculations within the control programs using stored information. Operators also need a
practical method of commanding and examining points. With the Open Processor, operators
use the commands and menu-driven prompts of the operator interface.
The point database is created by supplying the Open Processor with logical points and
information about the Trane BACnet objects. There are two basic classifications of point
information that make up the point database: information used to define Trane BACnet
objects, and information that is updated or set during operation of the Trane system.
In order to monitor and/or control Trane equipment controllers, points must be added to the
point database. For details about defining these points, refer to the point addressing
information that follows. For additional information about adding or modifying points in the
database, refer to the
System 600 APOGEE
Field Panel User’s Manual
(125-3000).