Allen-Bradley MicroLogix 1200 Reference Manual page 408

Glossary 2
Publication 1762-RM001C-EN-P
controller
A device, such as a programmable controller, used to control output
devices.
controller overhead
A portion of the operating cycle used for housekeeping purposes
(memory checks, tests, communications, etc.).
control profile
The means by which a controller determines which outputs turn on under
what conditions.
counter
A device that counts the occurrence of some event.
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 status and files where
user data (such as bit, integer, timers, and counters) 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 devices.
download
The transfer of program or data files to a device.
DTE
Data Terminal Equipment
EMI
Electromagnetic interference.
embedded I/O
Embedded I/O is the controller's on-board I/O. For MicroLogix
controllers, embedded I/O is all I/O residing at slot 0.
expansion I/O
Expansion I/O is I/O that is connected to the controller via a bus or cable.
MicroLogix 1200 controllers use Bulletin 1762 expansion I/O. MicroLogix
1500 controllers use Bulletin 1769 expansion I/O. For MicroLogix
controllers, embedded I/O is all I/O residing at slot 1 and higher.