Emerson IEC 62591 Instruction Manual page 73

IEC 62591 Wireless Interface Instruction Manual (for ROC800-Series and FloBoss 107)
D
(continued)
Download The process of sending data, a file, or a program from a PC to a ROC.
DP Differential Pressure.
DSR Data Set Ready modem communications signal.
DTE Data Terminal Equipment.
DTR Data Terminal Ready modem communications signal.
Proportion of time during a cycle that a device is activated. A short duty cycle
Duty Cycle
conserves power for I/O channels, radios, and so on.
DVM Digital voltmeter.
DVS Dual-Variable Sensor. A device that provides static and differential pressure inputs to a
ROC.
E
EDS Electronic Static Discharge.
EEPROM Electrically Erasable Programmable Read-Only Memory, a form of permanent memory
on a ROC.
EFM Electronic Flow Metering or Measurement.
EIA-232 Serial Communications Protocol using three or more signal lines, intended for short
(RS-232) distances. Concerning RS232D and RS232C, the letters C or D refer to the physical
connector type. D specifies the RJ-11 connector where a C specifies a DB25 type
connector.
EIA-422 Serial Communications Protocol using four signal lines.
(RS-422)
EIA-485 Serial Communications Protocol requiring only two signal lines. Can allow up to 32
(RS-485) devices to be connected together in a daisy-chained fashion.
EMF Electro-Motive Force.
EMI Electro-Magnetic Interference.
ESD Electro-Static Discharge.
EU Engineering Units. Units of measure, such as MCF/DAY.
F
FCC Federal Communications Commission. See http://www.fcc.gov.
Firmware Internal software that is factory-loaded into a form of ROM. In a ROC, the firmware
supplies the software used for gathering input data, converting raw input data values,
storing values, and providing control signals.
FlashPAC ROM and RAM module for a ROC300-Series unit that contains the operating system,
module applications firmware, and communications protocol.
Flash ROM A type of read-only memory that can be electrically re-programmed. It is a form of
permanent memory (requires no backup power). Also called Flash memory.
FloBoss A microprocessor-based device that provides flow calculations, remote monitoring, and
remote control. A FloBoss is a type of remote operations controller (ROC).
FM Factory Mutual.
Force Write an ON/OFF, True/False, or 1/0 value to a coil.
™
F An open architecture for information integration, managed by the Fieldbus Foundation
OUNDATION
Fieldbus (www.fieldbus.org).
FPV Compressibility Factor.
FSK Frequency Shift Keypad.
Revised June-2018 Glossary A-3