Emerson ROC827 - Manual (Page 129)

ROC827 Instruction Manual
Issued Mar-06 Glossary A-3
D (continued)
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
(RS-232) Serial Communications Protocol using three or more signal lines, intended for short
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
(RS-422) Serial Communications Protocol using four signal lines.
EIA-485
(RS-485) Serial Communications Protocol requiring only two signal lines. Can allow up to 32
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
module ROM and RAM module for a ROC300-Series unit that contains the operating system,
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 microprocess-based device that provides flow calculations, remote monitoring, and
remote control. A FloBoss is a type of ROC.
FM Factory Mutual.
Force Write an ON/OFF, True/False, or 1/0 value to a coil.
FPV Compressibility Factor.
FSK Frequency Shift Keypad.
FST Function Sequence Table, a type of user-written program in a high-level language
designed by Emerson Process Management’s Flow Computer Division.
Ft Foot or feet.
G
GFA Ground Fault Analysis.
GND Electrical ground, such as used by the ROC’s power supply.
GP Gauge Pressure.