BACnet Settings

To Edit BACnet Settings:

1. In the Workbench, select the BACnet branch in the Project Explorer for BACnet. There are multiple ways to begin the Edit function:

   • Double-click the Devices branch of the Tree Explorer.
     -OR-

     

   • Right-click the Devices branch of the Tree Explorer then click on Edit.
     -OR-

     

   • Select the Devices branch of the Tree Explorer then click on the Edit button in the Edit section of the Home ribbon at the top of the the Workbench screen.

     

     

2. This opens the BACnet Settings in the right pane of the Workbench.

The Devices properties contains three tabs:

General Tab

Communication Tab

Automatic Time Synchronization Tab

General Tab

Devices - General Tab

Runtime Settings

1. • Local Device ID: Specifies a Device ID for BACnet Runtime. When the ID is set to -1, then the ID is generated automatically during the startup from the IP address where BACnet Runtime is running.

   • Network: Specifies a network number where BACnet Runtime is running.

   • Default Decimal Places: Specifies the default number of decimal places of real values. -1 means automatic (calculated from the device’s properties).

   • Default Polling Rate (s): Sets the frequency of communication between BACnet devices and the BACnet Connector. Range can be between 0 and 4194303. Default is 100.

   • Default Priority: Sets a number between 1 and 16 as to the criticality of a device, in comparison with others. Assigning a priority level marks the importance of messages and which will override others. Some numbers are pre-assigned (1, 2, 5, 6, 8), with life safety naturally having highest priority. Other numbers (3, 4, 7 and 9 through 16) are not assigned and therefore are available for users to set their own priorities. Default is 8.

    

1. • Enable Remote BBMD Management:

   • Service Type:  Select the service type: Automatic, ReadProperty, ReadPropertyMulitple, ConfirmedCOV, or UnconfirmedCOV. Default is Automatic.

   • Read Range Type: This can be Buffer Position + Time, Time + Sequence Number or Time. Default is Buffer Position+Time.

Logging

1. • Log Level:  Can be set to None, Error, Info, Warning, Network or Debug.

   • Log File: The location and file where logging is to be done.

Browsing

• Resolve Device Names: Will show names of devices in the runtime tree (instead of just IDs)

• Resolve Object Names: Will show names of objects in the runtime tree (instead of just IDs)

• Show Network: Will show the different Network IDs in the runtime tree

• Show Object Type: Will show the types of objects in the tree (e.g. Analog Input, Trend Log, etc.)

• Show IDs: Will show the IDs of an object in parentheses next to the object name (in the runtime tree)

• Show Instances: Will show the device/object instance.

• Clear Cache Now: Clears the disk cache and scans the devices from the network immediately

• Send Who-Has: Opens a dialog where you can find the object using the Who-Has message.

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Communication Tab

Editing Devices - Communication Tab

WhoIS Settings

1. • Save Object Cache: When the option is disabled, the disk cache is not used (it is not saved)

   • Cache Update (s): Specifies how often the BACnet address space is saved (updated) into the disk cache

Communication Settings

1. • APDU Timeout (ms): Sets the time the Application Protocol Data Unit driver will wait for response from a connected device before trying again or proceeding to the next request. Range can be between 300 to 30000 milliseconds. Default is 300.
   • Expiry Time (s): This is the time taken before a value is removed from the cache
   • Subscribe Timeout (ms): Specifies a period in which the subscribe and unsubscribe of the points is done
   • Re-Subscribe COV Period (s): Specifies re-subscribe period for the change of value (COV) subscriptions (in seconds).
   • APDU Segment Timeout (ms): Sets the amount of time before retransmitting an Application Protocol Data Unit segment. Range can be between 300 to 30000 milliseconds. Default is 300.
   • Consecutive Errors: When the number of Consecutive Errors to the device exceeds the maximum value, then polling of the device will be flagged as offline and it will not be polled again until the Offline Poll Interval is exceeded
   • Max Properties Per Request: Specifies the maximum number of properties per request.
   • Max Concurrent Transactions: Specifies the maximum number of concurrent transactions in the BACnet stack (like threads).
   • APDU Retries: Sets the maximum number of times that the Application Protocol Data Unit will be transmitted. Range can be between 0 and 5. Default is 0.

   • Offline Device Polling (s): When the number of Consecutive Errors to the device exceeds the maximum value, then polling of the device will be flagged as offline and it will not be polled again until the Offline Poll Interval is exceeded

   • Who-Is Period (s): Specifies the 'Who-Is' period for the devices that did not yet reply with 'I-Am ...'.

   • Segmentation Supported: Specifies whether the segmentation is supported by the BACnet Runtime or not

Network and Device Scanning Settings

• Max Read Retries During Scan: Specifies the maximum number of read retries if initially prevented.

• Max Req. Per Device During Scan: Specifies the maximum number of requests per device.

• Max Simultaneously Scanned Devices: Specifies the maximum number of scanned devices.

Notification Class Subscriptions

• Notification Type: Set to receive either Confirmed Notifications or Unconfirmed Notifications.

• Time Range: Use the entry fields and up/down buttons to set start and end times for the selected notifications.

• Valid Days: Click the checkbox next to each applicable day of the week for your set notifications.

• Transitions: Click the checkbox for the type of desired transition from the notification. Options are To Normal, To OffNormal and To Fault.

• Max Subscribe Time (s): Specifies the maximum time for subscribing to the recipient list in the notification class.

• Subscribe Retry Period (s): Specifies the retry period for subscribing to the recipient list of the notification class.

• Max Unsubscribe Time (s): Specifies the maximum time for the unsubscribing from the recipient list in the notification class.

• Unsubscribe Retry Period (s): Specifies the retry period for unsubscribing from the recipient list of the notification class.

• Connection Check Period (s): Specifies the period in which the connection with the notification class is checked.

Alarm Cache Settings

• Synchronization Period (s): Specifies the synchronization period of the alarm cache.

• AE Summary Type: Options include Automatic, GetAlarmSummary, GetEnrolmentSummary and GetEventInformation.

• Device Init. Retry Period (s): Specifies the period in which the device is initialized after failure.

• Transition Max Initialization Time (s): Specifies the maximum time for the initialization of transitions.

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Automatic Time Synchronization Tab

Automatic Time Synchronization Tab

• Time Interval (m): Specifies the period of the automatic time synchronization.

• Use UTC Time: BACnet allows you to use one of two services for time synchronization. When “Use UTC Time” is checked, the UTC service is used for synchronization. Otherwise, a non-UTC service is used.

• Recipients: List of the recipients of the automatic time synchronization.

• Add: Adds a recipient of the automatic time synchronization.

• Remove Selected: Removes selected recipient(s) of the automatic time synchronization.

• Remove All: Removes all recipients of the automatic time synchronization.

• Recipient Type: (Appears when a Recipient has been added.) For time synchronization, you must specify the list of recipients. You can specify a Device ID or the device’s BACnet Address.

• Device ID: (Appears when a Recipient has been added.) The device has to be in our address space. Otherwise, the synchronization for the device will not work.

• Address: (Appears when a Recipient has been added.) It’s not necessary to have the device in our address space and you can also specify a broadcast.

3. Click Apply to proceed.

See also:

Exploring the Network