PI AF structure for BACnet data

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Last UpdatedJul 21, 2023
5 minute read

The PI AF structure that is created by the PI Connector for BACnet is intended to give maximum flexibility while grouping items together whenever possible. This is done through the hierarchy shown in the following diagrams. All non-routed devices and routers are listed at the top level and routed devices are listed as child assets to the corresponding routes.

See the list below for the PI AF attributes that are created for each type of BACnet object.

Router

IPAddress
NetworkNumber
NumberOfDevices

Device

Active COV Subscriptions
Active VT Sessions
Align Intervals
APDU Segment Timeout
APDU Timeout
Application Software Version
Auto Slave Discovery
Backup and Restore State
Backup Failure Timeout
Backup Preparation Time
Configuration Files
Database Revision
Daylight Saving Status
Description
Device Address Binding
Ethernet IP Address
Firmware Revision
Interval Offset
Last Restart Reason
Last Restore Time
Location
Manual Slave Address Binding
Max APDU Length Accepted
Max Info Frames
Max Master
Max Segments Accepted
Model Name
Number Of APDU Retries
Number of Objects
Object Identifier
Object List
Object Name
Object Type
Profile Name
Property List
Protocol Object Types Supported
Protocol Revision
Protocol Services Supported
Protocol Version
Restart Notification Recipients
Restore Completion Time
Restore Preparation Time
Segmentation Supported
Serial Number
Slave Address Binding
Slave Proxy Enable
Structured Object List
System Status
Time of Device Restart
Time Synchronization Interval
Time Synchronization Recipients
UTC Offset
UTC Time Synchronization Recipients
Vendor Identifier
Vendor Name
VT Classes Supported

Routed Device

Active COV Subscriptions
Active VT Sessions
Align Intervals
APDU Segment Timeout
APDU Timeout
Application Software Version
Auto Slave Discovery
Backup and Restore State
Backup Failure Timeout
Backup Preparation Time
Configuration Files
Database Revision
Daylight Saving Status
Description
Device Address Binding
Ethernet IP Address
Firmware Revision
Interval Offset
Last Restart Reason
Last Restore Time
Location
MAC Address
Manual Slave Address Binding
Max APDU Length Accepted
Max Info Frames
Max Master
Max Segments Accepted
Model Name
Network Number
Number Of APDU Retries
Number of Objects
Object Identifier
Object List
Object Name
Object Type
Profile Name
Property List
Protocol Object Types Supported
Protocol Revision
Protocol Services Supported
Protocol Version
Restart Notification Recipients
Restore Completion Time
Restore Preparation Time
Segmentation Supported
Serial Number
Slave Address Binding
Slave Proxy Enable
Structured Object List
System Status
Time of Device Restart
Time Synchronization Interval
Time Synchronization Recipients
UTC Offset
UTC Time Synchronization Recipients
Vendor Identifier
Vendor Name
VT Classes Supported

Accumulator

Acked Transitions
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
High Limit
Limit Enable
Limit Monitoring Interval
Logging Object
Logging Record
Low Limit
Maximum Present Value
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
Prescale
PresentValue
Profile Name
Property List
Pulse Rate
Reliability
Reliability Evaluation Inhibit
Scale
StatusFlags
Time Delay
Time Delay Normal
Units

Analog Input:

Acked Transitions
COV Increment
Deadband
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
High Limit
Limit Enable
Low Limit
Maximum Present Value
Minimum Present Value
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Resolution
StatusFlags
Time Delay
Time Delay Normal
Units
Update Interval

Analog Output

Acked Transitions
COV Increment
Deadband
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
High Limit
Limit Enable
Low Limit
Maximum Present Value
Minimum Present Value
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
Resolution
StatusFlags
Time Delay
Time Delay Normal
Units

Analog Value

Acked Transitions
COV Increment
Deadband
Description
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
High Limit
Limit Enable
Low Limit
Maximum Present Value
Minimum Present Value
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
Resolution
StatusFlags
Time Delay
Time Delay Normal
Units

Binary Input

Acked Transitions
Active Text
Alarm Value
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Inactive Text
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
Polarity
PresentValue
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
StatusFlags
Time Delay
Time Delay Normal

Binary Output

Acked Transitions
Active Text
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Feedback Value
Inactive Text
Minimum Off Time
Minimum On Time
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
Polarity
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
StatusFlags
Time Delay
Time Delay Normal

Binary Value

Acked Transitions
Active Text
Alarm Value
Description
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Inactive Text
Minimum Off Time
Minimum On Time
Notification Class
Notify Type
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
StatusFlags
Time Delay
Time Delay Normal

Multi-state Input

Acked Transitions
Alarm Values
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Fault Values
Notification Class
Notify Type
Number Of States
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
State Text
StatusFlags
Time Delay
Time Delay Normal

Multi-state Output

Acked Transitions
Description
Device Type
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Feedback Value
Notification Class
Notify Type
Number Of States
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
State Text
StatusFlags
Time Delay
Time Delay Normal

Multi-state Value

Acked Transitions
Alarm Values
Description
Event Algorithm Inhibit
Event Algorithm Inhibit Reference
Event Detection Enable
Event Enable
Event Message Texts
Event Message Texts Config
Event State
Fault Values
Notification Class
Notify Type
Number Of States
Object Identifier
Object Name
Object Type
Out of Service
PresentValue
Priority Array
Profile Name
Property List
Reliability
Reliability Evaluation Inhibit
Relinquish Default
State Text
StatusFlags
Time Delay
Time Delay Normal

The following screenshot shows a PI AF structure that includes non-routed and routed BACnet devices, with device attributes illustrated.

Sample PI AF structure showing device attributes

The following screenshot shows a PI AF structure that includes non-routed and routed BACnet devices, with object attributes illustrated.

Sample PI AF structure showing object attributes

PI Connector for BACnet