Analog Configuration Value object (ACnfVal)

'Present value' indicates the present value of the virtual variable.

Property ID: 85

"State flag" represents four boolean flags ("Out of service", "Overridden", "Fault", "In-Alarm") that indicate the general status of an object.

'Reliability' indicates whether the property value 'Present value' is reliable. If the 'Present value' is not reliable, the property 'Reliability' indicates the cause of the fault and the bit "Fault" of the state indication is set to 'True'. In a normal case, the property 'Reliability' is set to "No fault".

Property ID: 103

'Units' displays the physical unit of 'Present value'.

Property ID: 117

'Resolution' indicates the accuracy that a value represents. It defines the smallest recognizable change in engineering units of the property 'Present value' and be modified online.
'Resolution' is typically used for operating and monitoring functions to represent the 'Present value':
'Resolution' can only be an integer > 1.
'Resolution' is only used for an abbreviated depiction on the display, e.g. a station for operating and monitoring. It is not used to shorten the actual value that is processed by the program.

Property ID: 106

"Present maximum value" indicates the highest number in engineering units that can be reliably obtained for the "Present value" property of this object.

"Present minimum value" indicates the lowest number in engineering units that can be reliably obtained for the "Present value" property of this object.

'Change of value, COV' specifies the minimum change in 'Present value' property that will cause a COV notification to be issued to change-of-value subscribers of this object.

Property ID: 22

"Object access level" defines the instance-specific object access level. "Object access level" is used for generic filtering and processing an object by a client application.

• "Object access level" is a configuration property which can only be set up offline (ABT, application configuration).
• "Object access level" is evaluated by client applications such as Technical Operator, DB-Import, and APOGEE Point Team mapping.

Access level

Name

Description

7

Basic operation

Access to BACnet objects and properties for a room user e.g. data points visible on a room unit.

6

Standard operation

Access to BACnet objects and properties for standard operation and monitoring (daily business), .e.g. room and plant information on a management station.

5

Extended operation

Access to BACnet objects and properties for extended operation and monitoring such as network and device objects. All I/Os are visible

4

Administrator

Not used by HQ solutions yet.

3

Basic service

Access to BACnet objects and properties used for commissioning, e.g. configuration value extensions, I/O extensions, etc.

2

Extended service

Not used by HQ solutions yet.

1

Internal

Access to all BACnet objects and properties for very specialized actions e.g. during development.

"Object usage" indicates whether the object is used or unused. The "Object usage" property can hide or display respective objects and their functionality in a client. For example, room functionality can be marked for flexible room arrangements as used/unused. An object that is marked as unused behaves as if the object does not exist.

Property ID: 4930

"Description" is a string of printable characters whose content is not restricted.

"Object name" represents a name for the object that is unique internetwork-wide. The minimum length of the string is one character. The set of characters used in the "Object name" are restricted to printable characters.

A string of printable characters whose content is not restricted.