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GlobalViewer (GV)
A set of web pages (HTML, XML, JS) and graphics that are loaded
—
into the memory of an IPL T CR48. These pages provide an interface for control of devices
attached to the IPL T CR48. They communicate with the event scripts running on the unit,
and the event scripts issue the commands and queries. This communication between the
web pages and the event scripts occurs through predetermined memory locations in the
IPL T CR48. GV is initially created by GC; however, it is possible to edit the GV HTML, XML,
and JavaScript files outside of Global Configurator. This edited GV is called "hard-coded" or
manually generated GV.
HTTP
HyperText Transfer Protocol (HTTP), which is a web protocol based on TCP/IP, that
—
is used to fetch HyperText objects from remote web pages.
Internet Protocol (IP)
The protocol or standard used to send information from one
—
computer to another on the Internet.
IP address
A unique, 32-bit binary number (12-digit decimal number,
—
that identifies each sender and each receiver of information connected to a LAN, WAN,
or the Internet. IP addresses can be static (see
page 34).
IP Netmask
A 32-bit binary number (12-digit decimal number, xxx.xxx.xxx.xxx) used
—
on subnets (smaller, local networks) to help the router determine which network traffic gets
routed internally to local computers and which network traffic goes out on the Internet.
Media Access Control (MAC) Address
that connect to the Internet. When your computer or networking device (such as a router,
hub, or interface) is connected to the Internet, a table (see
address of the device to its corresponding physical (MAC) address on the LAN.
Pass-through
Allows control systems to work with the IPL T CR48 and provides a link
—
between two ports.
Ping
A utility that tests network connections. It is used to determine if the host has an
—
operating connection and is able to exchange information with another host.
Port number
A preassigned address within a server that provides a direct route from the
—
application to the Transport layer or from the Transport layer to the application of a TCP/IP
system.
Relay
An electromechanical device that opens or closes electrical contacts when
—
energized by an isolated electrical coil circuit.
Static IP
An IP address that has been specifically (instead of dynamically [see
—
page 34]) assigned to a device or system in a network configuration. This type of address
requires manual configuration of the actual network device or system and can only be
changed manually or by enabling DHCP.
Transmission Control Protocol/Internet Protocol (TCP/IP)
protocol (language) of the Internet. Computers and devices with direct access to the
Internet are provided with a copy of the TCP/IP program to allow them to send and receive
information in an understandable form.
Telnet
A utility available on most PCs that allows the computer system to communicate
—
with one of its remote users or clients. A user who wishes to access a remote system
initiates a Telnet session, using the address of the remote client. The user may be prompted
to provide a user name and password if the client is set up to require them.
URL encoding
Allows you to send information and commands to the unit to change its
—
configuration or provide you with feedback.
Static
IP) or dynamic (see
A unique hardware number given to devices
—
ARP
on page 34) relates the IP
The communication
—
IPL T CR48 • Glossary
)
xxx.xxx.xxx.xxx
DHCP
on
DHCP
on
35
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