Glossary
Appendix D
D-5
CMOS
Complementary Metal Oxide Semiconductor circuitry. See MOS.
Command
A function initiated by a user action.
Communication Rate
See Baud
Compatibility
(1) The ability of various specified units to replace one another, with little
or no reduction in capability. (2) The ability of units to be interconnected
and used without modification.
Complementary I/O:
An I/O technique that allows a processor to interface with input and output
modules using a single physical address located in different I/O racks.
Computer Interface
A device designed for data communication between a processor and
a computer.
Contact Histogram
A feature which allows a display (or printout) of the On and Off times for
any selected data table bit.
Control
(1) A unit, such as a processor or relay panel, which operates an industrial
application. (2) To cause a machine or process to function in a
predetermined manner. (3) To energize or de-energize a processor output,
or to set a data table bit to On or reset it to Off, by means of a program.
Control Panel
(1) A panel which may contain instruments or pushbutton switches. (2) In
the Advisor system, a device which allows an operator to access and
control plant operations through manipulation of the processor data table.
CPU
See Central Processing Unit.
