Siemens Simatic Field PG Manual page 127

BIOS
Acronym for Basic Input/Output System. On PC-compatible computers, the set of
essential software routines that tests hardware at startup, starts the operating
system, and supports the transfer of data among hardware devices.
Boot Diskette
Boot disk that contains a boot sector and an initial loader for the operating system.
Boot
Start or restart of the PG. During the boot sequence the operating system is
transferred from the system drive into the main memory.
Booting
Loading operation which transfers the operating system to the main memory.
Bps
The speed (in bits per second) with which information is transmitted over a data
link.
C
Cache
The cache memory buffers often used data to increase the speed of access. The
computer has two cache levels.
Cardbus interface
This interface is compatible with 32-bit Cardbus Cards with PCI performance
compliant with the PC Card standard.
CD ROM
Compact Disc Read Only Memory. Removable memory for large amounts of data.
Click
Pressing and immediately releasing the left mouse button; selects objects or
triggers commands.
COM1 Port
Serial V.24/modem-PLC interface. This interface is suitable for asynchronous data
transmission. It can also be used to connect printers with a serial interface.
SIMATIC Field PG Manual
A5E00075760-04
Glossary
Glossary-3