Instruction Manual

98 Appendix A: Glossary
Application Device
A L
ONWORKS device that runs an ISO/IEC 14908-1 application (OSI Layer 7). The
application may run on a Neuron Chip or Smart Transceiver, in which case the device is
called a “Neuron hosted” device.
Application Image
Device firmware that consists of the object code generated by the Neuron C compiler
from the user’s application program and other application-specific parameters, including
the following:
• Network variable fixed and self-identification data
• Network variable device interface data
• Program ID string
• Optional self-identification and self-documentation data
• Number of address table entries
• Number of domain table entries
• Number and size of network buffers
• Number and size of application buffers
• Number of receive transaction records
• Input clock speed of target Neuron Chip or Smart Transceiver
• Transceiver type and bit rate
Application Program
The software code in a L
ONWORKS device that defines how it functions. The application
program, also referred to as the application, may be in the device when you purchase it,
or you may load it into the device from application image files (.APB, .NDL, and .NXE
extensions) using the LonMaker tool or other network management tool. The application
program interfaces with the ISO/IEC 14908-1 firmware to communicate over the
network. It may reside completely in the Neuron Chip or Smart Transceiver, or it may
reside on an attached host processor (in a host-based device).
Binding
Process of connecting network variables. Binding creates logical connections (virtual
wires) between L
ONWORKS devices. Connections define the data that devices share with
one another. Tables containing binding information are stored in the device’s
non-volatile memory, and may be updated by the LonMaker tool or the ISI protocol.
Changeable-Type Network Variable
A network variable that has a type and length that can be changed to that of another
network variable type of equal or smaller size. You can use changeable-type network
variables to implement generic functional blocks that work with different types of inputs
and outputs.
Channel
The physical media between devices upon which the devices communicate. The ISO/IEC
14908-1 protocol is media independent; therefore, numerous types of media can be used
for channels: twisted pair, power line, fiber optics, IP, and RF, and other types.
Clock Multiplier
For Series 5000 chips, you can select the frequency at which the Neuron Chip or Smart
Transceiver runs to modify the internal system clock speed. You can select multipliers of
½, 1, 2, 4, and 8 to adjust the internal system clock speed from 5 MHz to 80 MHz (based
on a crystal running at 10 MHz). For Series 3100 chips, the clock multiplier is fixed at ½.