Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 238)

Glossary
Appendix B
BĆ2
Analog Output Module
A module that outputs a signal proportional to a number transferred to the
module from the processor.
Application
1) A machine or process monitored and controlled by a programmable
controller. 2) The use of computer-based or processor-based routines for
specific purposes.
Arithmetic Capability
The ability to do addition, subtraction, multiplication, division, and other
advanced math functions with the programmable controller.
ASCII
American Standards Code for Information Interchange. It is a seven-bit code
with an optional parity bit used to represent alphanumerics, punctuation marks,
and control code characters.
Asynchronous Scanning
A scanning technique performed by the CPU where two scanners (I/O and user
program) operate independently of each other.
Backplane
A printed circuit board, located in the back of a chassis, that contains a data bus,
power bus, and connectors for modules to be inserted in the chassis.
Backup
A device or system that is kept available to replace something that may fail in
operation. Also see Hot Backup.
Battery Backup
A battery or set of batteries that provide power to processor memory only in
case of a system power outage.
Battery Low
A condition that exists when the backup battery voltage drops low enough to
require battery replacement. Generally, an indicator or status bit signals
this condition.
Baud
A unit of signaling speed equal to the number of discrete conditions or signal
events per second.
BCD
See Binary Coded Decimal.
Binary
A numbering system using only the digits 0 and 1. Also called base 2.