Siemens SIMATIC Field PG P4, Manual, Page: 141 / 144

Glossary
Glossary-15
SIMATIC Field PG P4 Manual
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T
The cursor shows where text may be entered, for example, in text editors and in
dialog windows. In many applications the position of the cursor can be changed by
moving and clicking with the mouse pointer.
TFT
Thin-Film-Transistor. Technology for liquid crystal displays (LCD). The display
consists of a large grid of LCD cells. Each one of the pixels represents a single
cell. The electrical field in the cells is supported by thin film transistors.
Touchpad
The Touchpad is used in many programs (with mouse control) as an input device
for cursor control and menu operation. The Touchpad works with touch-sensitive
sensors. The cursor can be moved over the screen with the touch of a finger.
U
USB
Acronym for universal serial bus. A serial bus with a data transfer rate of max.
12 megabits per second (Mbps) for
USB 1.1 or 480 Mbps for USB 2.0 for
connecting peripherals to a computer. USB can connect up to 127 peripherals,
such as external CD-ROM drives, printers, modems, mice, and keyboards, to the
system through a single, general-purpose port. This is accomplished by daisy
chaining peripherals together.
The software-controlled menus and screens on the monitor through which the user
communicates with the program.
User program
Contains all instructions, declarations and signal processing data that can be used
for system or a process control. It is assigned to a programmable module (for
example, CPU, FM) and can be split into smaller blocks (modules).
V
VGA
Video Graphics Array. Industrial standard graphics adapter for use with any
commonly used software.
Text Cursor
User Interface