Glossary of Terms

application

A piece of software (a program) consisting of one or more

 

processes and supporting functions.

ASCII

American Standard Code for Information Interchange. A

 

seven-bit code that standardizes a set of characters

 

representing letters and numbers for international use.

baud rate

A measurement of the speed of a communications line; the

 

number of times a line can change state in one second; the

 

rate at which a signal is modulated.

binary

A number system having only two symbols (1 and 0), and

 

where values are expressed in the base two number

 

system.

bit

Abbreviation of binary digit. The smallest unit of

 

information in a binary system. Has a value of either one

 

(1) or zero (0).

char

The name of a data-type in the C programming language.

 

Stands for character, or a group of eight bits that function

 

as a single unit.

cyclic redundancy check

An error-detection scheme that checks the integrity of a

 

transmitted message for errors introduced during

 

transmission. Abbreviated as CRC.

data-collection

A software application that acquires data from and sends

application

data to various intelligent electronic devices. Abbreviated

 

as DCA.

data-processing

A software application that requests and processes data as

application

it is required by (usually) a master station. Abbreviated as

 

DPA.

host

The client or host station/computer, with which the RTU

 

equipment communicates. Also called a master or master

 

station.

logical remote unit

An RTU that exists in software, but not physically. LRUs

 

are created by software partitioning of a single physical

 

 

Restricted

A071-0CG-2.02-2

Full

21

 

Page 33
Image 33
GE A071-0CG manual Glossary of Terms, Ascii