Response Electronics CL6011B Especificaciones Pagina 150

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Original — December 1991
UM4.6:CS6003
Glossary-28
Radio Frequency Interference (RFI)
Inadvertently transmitted energy that falls in the frequency band of radio
signals. If this energy is sufficiently strong, it can influence the operation
of electronic equipment.
RAM Acronym: Random-Access Memory
Random-Access Memory (RAM)
A type of semiconductor memory. A user can read from and write to a
RAM as often as desired.
RAT Abbreviation: Ratio
Rate Another name for derivative control action.
Ratio A proportion that a controller maintains between the values of two
variables, as part of a control strategy. The ratio is usually defined as a
tunable value during configuration of the controller so that it may be
adjusted on-line.
RCV Abbreviation: Receive
Read-Only Memory (ROM)
A memory in which information is stored permanently. A user can
examine ROM contents as often as desired but cannot change the
contents.
Read/Write Memory (RWM)
Another name for random access memory (RAM).
REC AO Acronym: Data Record Analog Output
Reference Register
A type of register used in an FST or a calculation. A reference register
can be written into or read by other PROVOX system devices, but the
device containing the register can only read its value.
Register A memory location for temporary storage of a value.
REQ/RESP Acronym: Request/Response
Reset 1. To return the MPU and any associated circuits to their starting states.
2. The name given to a button a user pushes for such a reset, or to a
signal directing such a reset.
3. Another name for integral control action.
Resistance Temperature Detector (RTD)
A device or element that measures process temperature very accurately.
RTDs sense temperature changes by measuring the resistance of a
coiled metal wire, typically platinum.
Rad - Res
Glossary
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