Echelon OpenLNS Commissioning Tool - Manual (Page 367)

OpenLNS CT User’s Guide 351
Control Network Protocol (CNP)
A communication protocol standard for control networks defined by the ISO/IEC 14908-1 standard.
The CNP provides a standard method for devices on a L
ON W ORKS network to exchange data. The
CNP defines the format of the messages being transmitted between devices, and it defines the actions
expected when one device sends a message to another. The protocol normally takes the form of
embedded software or firmware code in each device on the network.
Custom Master Shape
A configured OpenLNS CT SmartShape or group of OpenLNS CT SmartShapes saved to a stencil.
Custom master SmartShapes enable common devices and functions to be re-used easily. Custom
master SmartShapes are used to speed up network design, as they already contain configuration data
when they are added to an OpenLNS CT drawing. A custom device master SmartShape, for example,
may contain the device template name and configuration property settings.
Data Point
A network variable, configuration property, or functional block state (enabled or in override) that
OpenLNS CT can monitor and/or control.
Decommissioning
Process in which devices are temporarily uninstalled. Decommissioning devices is useful when
optimizing, troubleshooting, or repairing a network. All the configuration data of a decommissioned
device, including configuration properties and connections, are preserved in the OpenLNS network
database. OpenLNS CT can also preserve the Neuron ID of a decommissioned device to speed up the
recommissioning process.
Destination Address
The logical address contained in every LonTalk packet of the device or group of devices designated to
receive the packet. The destination address can be the unique Neuron ID, the logical device address, a
group address, or a broadcast address.
Device
A device that communicates on a L ON W ORKS network. A device may be an application device,
network service device, or a router. Devices are sometimes referred to as nodes in L ON W ORKS
documentation.
Device Interface (XIF)
The logical interface to a device. A device interface specifies the number and types of functional
blocks; number, types, directions, and connection attributes of network variables; and the number of
message tags. The program ID field is used as the key to identify each device interface. Each program
ID uniquely defines the static portion of the interface. However, two devices with identical static
portions may differ if dynamic network variables are added or removed, or if the types of changeable
network variables are changed. Thus it is possible to have devices with the same program ID but
different device interfaces.
Device Interface (XIF) File
A file that documents a device's interface with a network. The file can be a text file (.XIF extension),
or it can be a binary file (.XFB extension).
Device Discovery
Commissioning process in which OpenLNS CT searches the network for unconfigured devices and
matches them to device SmartShapes defined in the OpenLNS CT drawing.
Device-Specific Configuration Property
A configuration property that has values that can be modified independent of the network database.
Changes made to a device-specific configuration property are not updated in the network database.