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ROC800-Series Instruction Manual
A-4
Glossary
Revised Jul-14
F
(continued)
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.
GHz
Gigahertz, 10
9
cycles per second
GND
Electrical ground, such as used by the ROC’s power supply.
GP
Gauge Pressure.
H
H1
A Foundation Fieldbus protocol operating at 31.25 kbit/s that interconnects field
devices (such as sensors or I/O devices).
HART
Highway Addressable Remote Transducer.
Holding
Register
Analog output number value to be read.
HSE Protocol
High Speed Ethernet protocol; a communications protocol operating at 100 Mbit/s used
to integrate high-speed controllers (or servers) connected via Ethernet.
Hw
Differential pressure.
Hz
Hertz.
I, J
IC
Integrated Circuit. Also, Industry Canada (more recently known as Measurement
Canada), an organization that grants custody transfer approvals on certain ROC units.
ID
Identification.
IEC
Industrial Electrical Code or International Electrotechnical Commission. See
http://www.iec.ch.
IEEE
Institute of Electrical and Electronic Engineers. A professional organization that, in
conjunction with the International Standards Organization (ISO), establishes and
maintains the Open System Interconnection (OSI) reference model and an international
standard for the organization of local area networks (LANs). Refer to
http://www.ieee.org.IMV
Integral Multiplier Value, used in AGA3 (orifice) calculations.
Input
Digital input, a bit to be read.
Input Register
Input numeric value to be read.
Local Port
Also LOI; the serial EIA-232 (RS-232) port on the ROC through which local
communications are established, typically for configuration software running on a PC.
I/O
Input/Output.
I/O Module
Module that plugs into an I/O slot on a ROC to provide an I/O channel.
IRQ
Interrupt Request. Hardware address oriented.
ISO
International Standards Organization. See
http://www.iso.ch.
IV
Integral Value.