IEC 62591 Wireless Interface Instruction Manual (for ControlWave Micro)
A-2
Glossary
Revised October-2019
C
(continued)
ControlWave
A brand name for a family of controllers (RTUs) and flow computers available from
Emerson.
ControlWave
Designer
A software configuration tool that lets you create programming logic for the
ControlWave controller or flow computer.
CPU
Central Processing Unit.
CRC
Cyclical Redundancy Check error checking.
CSA
Canadian Standards Association. See http://www.csa.ca.
CTS
Clear to Send modem communications signal.
D
DCE
Data Communication Equipment.
Deadband
A value that is an inactive zone above the low limits and below the high limits. The
purpose of the deadband is to prevent a value (such as an alarm) from being set and
cleared continuously when the input value is oscillating around the specified limit.
DI
Discrete Input.
Discrete
Input or output that is non-continuous, typically representing two levels (such as on/off).
DO
Discrete Output.
Download
The process of sending data, a file, or a program from a PC to an RTU.
DP
Differential Pressure.
DSR
Data Set Ready modem communications signal.
DTE
Data Terminal Equipment.
DTR
Data Terminal Ready modem communications signal.
Duty Cycle
Proportion of time during a cycle that a device is activated. A short duty cycle
conserves power for I/O channels, radios, and so on.
E
EEPROM
Electrically Erasable Programmable Read-Only Memory, a form of permanent memory.
EFM
Electronic Flow Metering or Measurement.
EMI
Electro-Magnetic Interference.
ESD
Electro-Static Discharge.
F
FCC
Federal Communications Commission. See http://www.fcc.gov.
Field
Communicator
A portable configurator which lets you set certain parameters in a wired or wireless
device such as a transmitter.
Firmware
Internal software that is factory-loaded into the ControlWave RTU.
Flash
A type of memory that can be electrically re-programmed. It is a form of permanent
memory (requires no backup power). Also called Flash memory.
FM
Factory Mutual.
F
OUNDATION
™
Fieldbus
An open architecture for information integration, managed by the Fieldbus Foundation
(www.fieldbus.org).
FPV
Compressibility Factor.
Function Block
A software structure in ControlWave Designer that performs some calculation or other
function. Function blocks can include multiple inputs and multiple outputs. Sometimes
abbreviated as FB.
