Device Alert object (DevAlert)

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

Property ID: 85

"Enable event detection" allows to enable or disable event notifications of the corresponding object at engineering time. When "Enable event detection" is false, the internal algorithm of the object does not perform. Therefore, event notifications are not issued, and the dynamic properties of the object do not update.

"Suppress event detection" is a writeable property allowing event detection functionality to be temporarily enabled and disabled for the object instance at runtime.

"Suppress event notification" is a writeable property allowing event notification functionality to be temporarily enabled or disabled for the object instance at runtime.

"Configurable event message texts" consists of a set of three writable character strings, one for each state transition (TO-OFFNORMAL, TO-FAULT, and TO-NORMAL). These strings will be used as all or part of the message text parameter passed in event notifications.

"Event message texts" consists of a set of three writable character strings, one for each state transition (TO-OFFNORMAL, TO-FAULT, and TO-NORMAL). These strings will be used as all or part of the message text parameter passed in event notifications.

"Notification type" conveys whether the notifications generated by the object should be of type "Event" or "Alarm".

"Notification class" holds a reference to a "Notification class object", and indicates which "Notification class object" to use when generating notifications for this object.

'Event enable' enables or disables specific event notification functionality (i.e. during engineering/configuration).

To-Offnormal

Allows TO-OFFNORMAL event notification functionality to be enabled and disabled.

To-Fault

Allows TO-FAULT event notification functionality to be enabled and disabled.

To-Normal

Allows TO-NORMAL event notification functionality to be enabled and disabled.

"Configured event enable" is a Bitstring value consisting of the following three binary flags:

To-Offnormal

Allows TO-OFFNORMAL event notification functionality to be enabled and disabled for the object instance. Since BA-Device-Alert objects issue only TO-NORMAL notifications, setting this flag to true has no effect.

To-Fault

Allows TO-FAULT event notification functionality to be enabled and disabled for the object instance. Since BA-Device-Alert objects issue only TO-NORMAL notifications, setting this flag to true has no effect.

To-Normal

Allows TO-NORMAL event notification functionality to be enabled and disabled for the object instance.

"Event state" provides a way to determine if this object has an active event state associated with it. The "Event state" property indicates the event state of the object. Changes in the "Event state" property to the value FAULT are considered to be fault events. If the object does not support intrinsic reporting, then the value of this property is NORMAL.

Property-ID: 36

"Time stamp of event" conveys the times of the last event notifications for TO-OFFNORMAL, TO-FAULT, and TO-NORMAL events, respectively.

"Acknowledged transitions" conveys three flags that separately indicate the receipt of acknowledgments for TO-OFFNORMAL, TO-FAULT and TO-NORMAL events. These flags is cleared upon the occurrence of the corresponding event and set under any of these conditions:

• Upon receipt of the corresponding acknowledgment;
• Upon the occurrence of the event if the corresponding flag is not set in the "Event enable" property (meaning event notifications will not be generated for this condition and thus no acknowledgment is expected);
• Upon the occurrence of the event if the corresponding flag is set in the "Event enable" property and the corresponding flag in the "Acknowledgement required" property of the "Notification class" object implicitly referenced by the "Notification class" property of this object is not set (meaning no acknowledgment is expected).

'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

"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

"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.

"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.

"Object identifier" is a numeric code that is used to identify the object. It must be unique internetwork-wide.

"Object type " indicates membership in a particular object type class. E.g. "Analog input", "Binary output", "Event enrollment", "Trend log", etc.

"Building automation profile" is an enumeration that indicates a particular type of Siemens proprietary object. Siemens objects are based on standard BACnet objects. For example, Siemens Analog Input, Analog Output, Analog Calculated Value, and Analog Configuration Value are based on standard Analog Input, Analog Output, and Analog Value BACnet objects.

"Profile name" indicates the name of an object profile to which this object conforms. To ensure uniqueness, a profile name must begin with a vendor identifier code followed by a dash. All subsequent characters are administered by the organization registered with that vendor identifier code. The vendor identifier code that prefixes the profile name indicates the organization that publishes and maintains the profile document named by the remainder of the profile name.

A string of printable characters whose content is not restricted. (property is only used in ABT Pro)

Version of a copied object (copied from a library). (property is only used in ABT Pro)

Source of a copied object (copied from a library). (property is only used in ABT Pro)