Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 239)

Glossary
Appendix B
BĆ3
Binary Coded Decimal (BCD)
A numbering system used to express individual decimal digits (0 through 9) in
four-bit binary notation.
Binary Word
A related group of ones and zeros that has meaning assigned by position, or by
numerical value in the binary system of numbers.
Bit
Binary digit. The smallest unit of information in the binary numbering system.
Represented by the digits 0 and 1. The smallest division of a programmable
controller word.
Bit Manipulation
The process of controlling data table bits (on or off) through user instructions or
keyboard entry.
Bit Rate
See Baud.
Bit Storage
A user-defined data table area in which bits can be set or reset without directly
affecting or controlling output devices. However, any storage bit can be
monitored as necessary in the user program.
Block
A group of words transmitted as a unit.
Block Length
The total number of words transferred at one time.
Block Transfer
A programming technique used to transfer up to 64 words of data to, or from, an
intelligent I/O module.
Branch
A parallel logic path with a rung.
Buffer
1) In software terms, a register or group or registers used for temporary storage
of data, to compensate for transmission rate differences between the transmitter
and receiving device. 2) In hardware terms, an isolating circuit used to avoid
the reaction of one circuit with another.
Build
A programming concept that takes a user keyboard command (source code) and
converts it into hexadecimal format to generate an object code for
program execution.