Page 9CWT Compact S4 Touch Installation & Maintenance Manual for CWT 1.0-0Issue 3
Introduction
Firmware is a computer program that is embedded in a
hardware device, for example a micro controller. Firmware is
somewhere between hardware and software. Like software, it is
a computer program which is executed by a computer. But it is
also an intimate and vital part of a piece of hardware and has
little meaning outside of that particular hardware.
General Packet Radio Service is a mobile data service available
to users of GSM (see below) based mobile phones and
modems. GPRS is packet-switched meaning that multiple users
share the same transmission channel, only transmitting when
they have data to send. Thus, the total available bandwidth can
be immediately dedicated to users who are actually sending at
any given moment, providing higher utilization where users only
send or receive data intermittently. Usually, GPRS data are
billed per kilobytes of information transferred.
The Global System for Mobile communications is the most
popular standard for mobile phones in the world. It includes
packet data capabilities by means of GPRS (see above).
Short for Magnetic stripe
Printed Circuit Board – A thin board with electrical wires
"printed" onto the board, connecting the central processor to
other components on the board. Some examples of PCBs
include motherboards, RAM chips, and network interface
cards.
Radio Frequency Identification – An automatic
identification method, relying on storing and remotely retrieving
data using devices called RFID tags or transponders. An RFID
tag is an object that can be applied to or incorporated into a
product, animal, or person for the purpose of identification
using radio waves. Most RFID tags contain at least two parts.
One is an integrated circuit for storing and processing
information, modulating and demodulating an RF signal. The
second is an antenna for receiving and transmitting the signal.
Residual-current device
(RCD)
Also known as a ground fault circuit interrupter (GFCI), ground
fault interrupter (GFI) or an appliance leakage current
interrupter (ALCI). In Australia, they are sometimes known as
"safety switches". The device disconnects a circuit whenever it
detects that the electric current is not balanced between the live
and the neutral conductors. Such an imbalance is sometimes
caused by current leakage through the body of a person who is
grounded and accidentally touching the energized part of the
circuit.
TFT-LCD (Thin Film Transistor-Liquid Crystal Display) is a
variant of Liquid Crystal Display (LCD) which uses Thin-Film
Transistor (TFT) technology to improve image quality. TFT LCD
is one type of active matrix LCD, though it is usually
synonymous with LCD.
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