Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 197)

Glossary
Appendix B
BĆ4
CMOS
Acronym for Complementary Metal Oxide Semiconductor circuitry. An
integrated circuit family which has high threshold logic and low power
consumption, thus making it especially useful in remote applications where
supplying power becomes expensive.
The type of memory used in the Mini-2/15 programmable controller.
Code
A system of symbols (bits) for representing data.
Coding
The preparation of a set of instructions or symbols which, when used by a
programmable controller, have a special external meaning.
Color Code
A color system for component identification by use of solid colors, tracers,
braids, surface printing, etc.
Compare Function
A user-programmed instruction which equates numerical values for “equal” or
“less than” relationships in order to vary operation sequence or application.
Compatibility
The ability of various specified units to replace one another, with little or no
reduction in capability.
Control
1) A unit, such as a PC 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 PC output or set to “1” (on) or reset to “0” (off) a data
table bit, by means of user-programmed instructions.
Core Memory
A type of memory used to store information in ferrite cores. Each may be
magnetized in either polarity to represent a logic “1” to “0”. This type of
memory is non-volatile.
Counter
In relay-panel hardware, an electro-mechanical device which can be wired and
preset to control other devices according to the total cycle of one on and off
function. in pc, a counter is internal to the processor, which is to say it is
controlled by a user-programmed instruction. A counter instruction has greater
capability than any hardware counter. Therefore, most PC applications do not
require hardware counters.