374 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Glossary
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.
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