To support network variable selection at layer 6, each network variable on a device has a unique network variable index for that device. Network variable indexes are assigned sequentially for each network variable on the device, starting with index 0. For example, a device with a switch output and a switch feedback input may use index 0 for the output and index 1 for the input.

When sending a network variable update, the layer-6 implementation uses this table to translate the network variable index on the sending device to a network variable selector. This action translates the network variable selector to a network variable index on the receiving device.

(Description adapted from the Echelon Introduction to the LonWorks® Platform, Revision 2.)

Figure 18.   Alias Table property

To access this table, expand Config > Drivers > LonNetwork, right-click a dynamic device node, click Views > AX Property Sheet, expand Device Data and click Alias Table.