Echelon LonMaker - Manual (Page 409)

LonMaker User’s Guide 393
and is unconfigured, is off when the Neuron Chip has an application and is configured, and blinks once
quickly each time the Neuron Chip is reset.
Smart Connection Description (SCD)
A pre-defined connection description that the LonMaker tool automatically assigns to a connection
being created or changed based on the number of target network variables, whether the target network
variables are located on the same or different subnet, and the availability of network variable aliases.
Source Address
The logical node address of the transmitting device contained in every packet transmitted over a
L
ON W ORKS network.
Standard Configuration Property Type (SCPT)
A standard set of configuration property types defined by the L ON M ARK Association to facilitate
interoperability. SCPTs are defined for a wide range of configuration properties used in many kinds of
functional profiles, such as hysteresis bands, default values, minimum and maximum limits, gain
settings, and delay times. SCPTs should be used in a L
ON W ORKS network wherever applicable. In
situations where there is not an appropriate SCPT available, manufacturers may define UCPTs for
configuring their devices. See the L
ON M ARK web site for a current list and documentation.
Standard Network Variable Type (SNVT)
A standard set of network variable types defined by the L ON M ARK Association to facilitate
interoperability by providing a well-defined interface for communication between devices made by
different manufacturers. See the Echelon or L
ON M ARK website for a current list and documentation.
Stencil
A collection of master shapes that can be reused in Visio.
Structured Object
A network variable or configuration property that has a type with multiple fields. Examples of
structured objects include SCPTmaxSend Time (has fields for day, hour, minute, second, and
millisecond in the following format: 0 0:00:00.000) and SNVT_switch (has fields for value and state
in the following format: 0.0 0).
Subnet
A logical collection of up to 127 devices within a domain. Up to 255 subnets can be defined within a
single domain. All devices in a subnet must be on the same segment. Subnets cannot cross non-
permanent type routers.
Subsystem
A collection of application devices, routers, and functional blocks. With the LonMaker tool, each
subsystem corresponds to one page within a LonMaker drawing. Subsystems allow you to place
application devices, routers, and functional blocks onto separate pages for organizational purposes.
You can place a subsystem within another subsystem, allowing you to create a subsystem hierarchy for
large networks. For example, a network may consist of HVAC, lighting, security, and operator
subsystems. These may be further divided into subsystems for each floor, and each floor divided into
subsystems for each room.
Supernode
A subsystem with a network variable interface. Supernodes enable a group of devices to be organized
into logical units and complex subsystem details to be hidden; therefore, only the desired network
variables are exposed. This reduces errors and decreases the time required for network engineering
and commissioning. A supernode’s network variable interface may contain any network variable on
any device found within the supernode or its nested subsystems.