Emerson ROC827 EIA-232, EIA-422, RS-422 EIA-485, Firmware, FlashPAC, Flash ROM, FloBoss, Force

ROC827 Instruction Manual

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	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 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.
Issued Mar-06	Glossary	A-3