Manually mapping a series of LonWorks enabled devices - Johnson Controls - LIT-1201668 - System Integration - LonWorks Integration - 12.0

LonWorks Network Integration with Network Engines and LCS Technical Bulletin

Johnson Controls
Product name
LonWorks Integration
Document type
Technical Bulletin
Document number
Revision date
Product status

About this task

Note: The following steps assume that LN-Builder and SCT are on the same computer. Using the same computer allows you to toggle between LN-Builder and SCT to expedite the mapping process.

Manually mapping a series of LonWorks devices is typically used for many field devices of the exact same device type (for example, VAV Modular Assembly [VMA] or Heat Pump) that all require the exact same point and NV configuration. These devices often do not require all their points to be mapped, with the only difference being their name, Neuron ID, and DSN number. SCT Copy/Paste command is the key to this timesaving process.

Note: The Neuron ID is only stored as a reference and can be removed. The DSN Number is used to communicate to the LonWorks device.

If LN-Builder and SCT are on different computers, create a list that includes the device name, Neuron ID, and DSN number of each device in the series of devices on the LN-Builder Physical Tree.

To map a series of LonWorks field devices manually:


  1. Use LN-Builder to add and configure all LonWorks field devices in the series.
  2. See the manual procedures included in Mapping LonWorks devices using Auto Discovery in SMP and the section Manually mapping Field Points in LonWorks enabled devices to manually add the devices and points. You must upload the changes to SCT before continuing.
    Note: The Neuron ID cannot be duplicated from within a single LonWorks Integration. The Neuron ID must contain all zeros before a paste is allowed. Use Steps 8 and 9 in this section to modify the Neuron ID of the device that is being copied. Only the DSN number needs to be modified to match the pasted device.
  3. Select the new device and on the Edit menu, click Copy.
    Figure 1. Copy selected device

  4. On the Edit menu, click Paste to paste a copy of the first device, as the second device, into the Integration Tree. A message prompts you to enter a new name for the second device in the series. Duplicate names are not permitted.
    Figure 2. Paste item name in use message

  5. Enter a new name for the second device. Click Paste in the Paste Item Wizard window to add the second device to the Integration Tree.
    Note: Name devices consistently to avoid confusion when you enter the corresponding DSN number for each device in the series.
    Figure 3. Second device added to the Integration tree

  6. Repeat the paste and renaming process for every device in the series.
    Note: Once all devices in the series have been added to the Integration Tree, you must enter the correct DSN number for each device in the series, with the exception of the first device, which is already correct.
  7. Use SCT to select the second device in the series to begin the editing process.
  8. On the View menu, click Selected Item to open the Focus window.
  9. Select the Hardware tab to display the DSN number field, then click Edit.
    Figure 4. Edit Hardware screen (Neuron ID and DSN Number)

    Note: The DSN numbers, initially displayed for the second device and for all remaining devices in the series on the Integration Tree, are the same numbers as the first device in the series on the Integration Tree. The second device and all remaining devices in the series on the Integration Tree must be edited to match the DSN number of the corresponding device as shown on LN-Builder from the list view.
  10. Toggle to LN-Builder and select the second device of the series. Right-click and select Properties, then select the Identifier tab. You can copy and paste the Subnet/Node ID into the corresponding attributes of the network engine.


    • The Domain can be identified in LN-Builder by highlighting the database, right-clicking, and selecting Properties.
    • When mapping a series of LonWorks field devices manually using LN-Builder, make sure you record the hexadecimal format (Base 16) and not the decimal format (Base1 h10) when entering the data into the network engine. Both are available.
    • Devices imported into the Integration Tree using an .IMP file have the decimal DSN number automatically converted to hexadecimal.
    • Manual device discovery requires you to enter the DSN number in hexadecimal.
    Figure 5. LN-Builder Device Properties screen

    Figure 6. Device Summary view of Hardware tab

  11. Toggle to SCT.
  12. Use SCT to select the DSN box and replace the existing Subnet and Node number with the new hexadecimal number.
    Note: The Domain does not need to be changed if the device is being copied from within the same LonWorks Integration.
    Figure 7. Replacing the subnet node number

  13. Click Save to save all changes.
  14. Repeat 7 through 13 until all devices in the series have the correct DSN number.
  15. Go to Tools > Database > Create Backup in SCT to backup all changes.
  16. Download these changes to the network engine with Tools > Manage Archive > Download to Device.