Creating and configuring a Lonworks Network

Issue

Information regarding the creation and configuration of different LonWorks networks in SmartStruxure.

Product Line

SmartStruxure Solution

Environment

  • Lon Devices
  • LonWorks Networks
  • Xenta Devices
  • MNL Devices
  • Automation Server
  • Enterprise Server

Cause

The need to build a LonWorks Network underneath an Enterprise and/or Automation server.

Resolution

Overview- For more detail on LonWork network limits and architecture see Lessons Learned Article #7070.

As of version 1.4

  • The maximum number of Xenta 280/300/401 controllers is 100 in the Enterprise Server and 30 in the Automation server.
  • The maximum number of LonWorks devices per Enterprise Server is 200 and 64 for the Automation Server. LonWorks devices include MNL devices and Xenta 100 devices.
  • The total number of both Xenta 280/300/401 devices and LonWorks devices per Enterprise Server is 200 and 64 for the Automation Server. Xenta 4XX I/O modules hosted by a Xenta 280/300/401 devices are not counted as a LonWorks device.
  • The maximum number of NVs on the local node in an Enterprise Server or Automation Server is 400.
  • The maximum numbers of LonWorks networks in the Enterprise Server is 5 and is 1 for the Automation Server.
  • Xenta 280/300/401 needs to be of version 3.6 or higher. In version 3.8, a new feature improves the performance up to 500% when reading values in StruxureWare Building Operation. 
  • When using both LonWorks and BACnet MS/TP networks on the Automation Server, the network with more than 10 devices connected is considered to be the main network. The other network then supports up to 10 devices. The main network will support the number of devices specified in the table for the used protocol. For example, if the Automation Server has 64 LonWorks devices connected to it, the BACnet MS/TP network can support 10 devices.

Change in version 1.5

  • The maximum number of NVs on the local node in an Enterprise Server or Automation Server is 4096.

 


Local Node

  • The local node is required to add network variables into the SmartStruxure server that will be bound to network variables in LonWorks field bus devices.
  • You create output network variables in functional blocks in a local node for binding LonWorks variables between the Automation Server and the LonWorks devices.

 


Tutorials

The "Configuring a LonWorks Network with Xenta LonWorks Devices" and the "Configuring a LonWorks Network with MNL LonWorks Devices" documents walk you through the process of building fully functional LonWorks Network under an ES or an AS.