Echelon OpenLNS Commissioning Tool - Manual (Page 374)

358 Appendix B – Glossary
Node Object
A functional block that monitors the status of all functional blocks in a device and makes the status
information available for monitoring by OpenLNS CT. A L
ON M ARK -compliant device that has more
than one functional block must have a Node object.
NodeBuilder Tool
A hardware and software platform used to develop applications for Smart Transceivers and Neuron
Chips.
Non-Volatile RAM
Read/write processor memory that does not lose its contents when electrical power is removed. Two
widely used semiconductor technologies are EEPROM (electrically erasable programmable read-only
memory) and flash memory.
NV Selector
A 14-bit number used to identify connected network variables. When placing the network variable in a
connection, the OpenLNS Server connection binder assigns a value representing that connection. All
network variables in a given connection use the same network variable selector. The OpenLNS Server
shares a network variable selector among connections if the connections share one or more network
variables.
OffNet
A network management mode in which network configuration changes are stored in the OpenLNS
network database, but not propagated to the devices on the network. To send the changes to the
devices, you place OpenLNS CT OnNet. If OpenLNS CT is OffNet and attached to the network, you
can still read and write network variables, and read configuration properties.
OnNet
A network management mode in which network configuration changes are propagated immediately to
the devices on the network.
OpenLNS
A network operating system that provides services for interoperable L ON W ORKS installation,
maintenance, monitoring, and control tools such as the OpenLNS Commissioning Tool. Using the
services provided by the OpenLNS Server client/server architecture, tools from multiple vendors can
work together to install, maintain, monitor, and control L
ON W ORKS networks. The OpenLNS
architecture consists of the following elements:
1. An OpenLNS client application, which is a software application that uses OpenLNS services to
install, monitor, and control devices on a L ON W ORKS network. Multiple OpenLNS client
applications can share the services of a single OpenLNS Server.
2. The OpenLNS Object Server ActiveX Control, which is a language-independent programming
interface to access an OpenLNS Server.
3. The Network Services Server (NSS), which maintains an image of the network.
4. The Data Server, which provides services for monitoring and control.
5. The Network Services Interface (NSI), which is the physical interface to the network.