Allen-Bradley MicroLogix 1200 User Manual page 146

Glossary 2
Publication 1762-UM001D-EN-P - March 2004
controller
A device, such as a programmable controller, used to monitor input
devices and control output devices.
controller overhead
An internal portion of the operating cycle used for housekeeping and
set-up purposes.
control profile
The means by which a controller determines which outputs turn on
under what conditions.
counter
1) An electro-mechanical relay-type device that counts the occurrence
of some event. May be pulses developed from operations such as
switch closures or interruptions of light beams.
2) In controllers, a software counter eliminates the need for hardware
counters. The software counter can be given a preset count value to
count up or down whenever the counted event occurs.
CPU (Central Processing Unit)
The decision-making and data storage section of a programmable
controller.
data table
The part of processor memory that contains I/O values and files
where data is monitored, manipulated, and changed for control
purposes.
DIN rail
Manufactured according to Deutsche Industrie Normenausshus (DIN)
standards, a metal railing designed to ease installation and mounting
of your controller.
download
Data is transferred from a programming or storage device to another
device.
DTE (Data Terminal Equipment)
Equipment that is attached to a network to send or receive data, or
both.