Application NV Configuration View

Note: This screen displays only those NVs that are used in this Application.

A Network Variable (NV) is a data item such as a temperature, a switch value or actuator state. NVs can be thought of simply as point parameters. LonMark functional profiles define Standard Network Variable Types (SNVTs), but additional non-standard NVs are usually available, depending on the device, to store additional non-standard data.

There are three categories of NVs that the Lon Spyder supports. They are:

The Honeywell SpyderTool provides the following four built-in functions that enable you to connect function blocks with other function blocks.

The Honeywell Spyder Tool provides built-in functions, Network Variable Inputs, to allow the selection of variables that are available from/to the network. The configured network variables are mapped to the Function Block memory space to be used by any Function Block. Each Network variable may be configured with a name.

Viewing the List of Network Variables

  1. Browse to Station > Config > Drivers > LonNetwork > LonSpyder.
  2. Expand ControlProgram and right-click Application and select Views > NV Configuration View. The summary page appears with a list of NVs used in the Program.

The table has the following columns:

  1. You have options to:
    Show Mandatory and Fixed NVs - Click this button to view list of all Mandatory and Fixed NVs for the selected Spyder model.
    Show on wiresheet as points
    - See the Add NVI, Add NCI, Add NVO, or Add Many to One NV topics for more details.
    Add NV - See the Add NVI, Add NCI, Add NVO, or Add Many to One NV topics for more details.
    Edit NV - See the Editing Network Variables topic for more details.
    Delete NV - See the Editing Network Variables topic for more details.
  2. The bottom half of the NV Configuration view displays the software points available on the wiresheet in a tabular format.
    The table has the following columns:

Note: