B&R Industries Automation PC 620, Руководство пользователя

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Appendix A • Glossary
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477 Automation PC 620 User's Manual V 1.90
Floppy
Also known as a diskette. A round plastic disk with an iron oxide coating, which can store a
magnetic field. When the floppy disk is inserted in a disk drive, it rotates, so that the different
areas (or sectors) of the disk's surface are moved under the read-write head, allowing the
magnetic orientation of the particle to be modified and recorded. Orientation in one direction
represents binary 1, while the reverse orientation represents binary 0.
FPC
An abbreviation for »Flat Panel Controller«
FPD
An abbreviation for »Flat Panel Display«
FTP
»File Transfer Protocol« Rules for transferring data over a network from one computer to another
computer. This protocol is based on TCP/IP, which has established itself as quasi standard for
the transfer of data via Ethernet networks. FTP is one of the most-used protocols on the Internet.
It is defined in RFC 959 in the official regulations for Internet communication.
GB
Gigabyte (1 GB = 230 or 1,073,741,824 Bytes)
Handshake
Method of synchronization for data transfer when data is sent at irregular intervals. The sender
signals that data can be sent and the receiver signals when new data can be received.
HDD
An abbreviation for »Hard Disk Drive« ; Fixed magnetic mass memory with high capacities e.g.
120 GB.
IDE
An abbreviation for »Integrated Drive Electronics« A drive interface where the controller
electronics are integrated in the drive.
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