Honeywell placa de retea HC900 Manual

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Honeywell placa de retea HC900
Components and Architecture - Networking Basics Reference
Revision 5 HC900 Hybrid Controller Installation and User Guide 31
9/03
Name/Acronym Name/Definition Comments
Modbus TCP/IP Variant of Modbus protocol
Modbus TCP/IP is a derivative of related Modbus
protocol used with RS-232 or RS-485 data
acquisition and supervisory structures. Basically,
Modbus TCP/IP encapsulates Modbus messages in
TCP frames for transport in an Ethernet network.
Modem
Modulator-Demodulator; a
device for translating data in
differing media and/or
format.
Modems are commonly used for transmitting
digital data over analog telephone lines. A modem
is required at each end of the link.
Multicast
Transmission of a message
with multiple destinations.
Name Server
Network software that
translates text-format names
into numeric IP addresses
See also “DNS”.
NetBIOS
/NetBEUI
Microsoft networking
protocols
Used with Microsoft LAN Manager and Windows
NT products.
netid Network Identifier
The portion of the IP address (left part) that
identifies the network.
Netware
Network operating System
(NOS) by Novell
Network
A system of
interconnections in which
networking devices such as
Hubs, Bridges, etc transport
messages between
computing devices.
“Computing devices” often include Personal
Computers (PCs), but also can include other
computer-based devices such as process
controllers, operator interface units, and graphical
trending devices.
Network Address
A code that resides in a
networked device, and that
identifies the device
uniquely on the network(s)
to which it is connected.
The identifying code is usually numeric, but
additional, text-oriented Name codes can for added
user convenience in device identification.
Network addresses usually include a MAC address
and an IP address, and may also include Host
Name (for a PC) or other text-oriented user name.
Network
Management
Administrative services that
include configuration,
tuning, performance
monitoring, and problem
diagnosis and repair.
Many commercial and industrial facilities have
large networks that are managed by full-time,
professional IT employees. Other facilities
contract the services of professional IT agencies.
For networks that are dedicated for special
purposes (process control, for example), and are
uncomplicated and easy to control, Network
Management is sometimes assigned to local
employees as a part-time, add-on responsibility.
Advised judgment is recommended.
NIC Network Interface Card
The NIC is plugged into one of the PC’s expansion
slots. It includes the hardware and software (OSI
Layer 1 and Layer 2) required for connecting the
PC to the network.
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