Emerson ROC827 Highway Addressable Remote Transducer, Input Register, Local Port, Kilobytes

ROC827 Instruction Manual

H

HART	Highway Addressable Remote Transducer.
Holding	Analog output number value to be read.
Register
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.

K

KB	Kilobytes.
KHz	KiloHertz.

L

LCD	Liquid Crystal Display.
LDP	Local Display Panel, a display-only device that plugs into ROC300-Series units (via a
	parallel interface cable) used to access information stored in the ROC.
LED	Light-Emitting Diode.

Logical Number The point number the ROC and ROC Plus protocols use for I/O point types are based on

	a physical input or output with a terminal location; the point numbers for all other point
	types are “logical” and are simply numbered in sequence.
LNK	Ethernet has linked.
LOI	Local Operator Interface (or Local Port). Refers to the serial EAI-232 (RS-232) port on
	the ROC through which local communications are established, typically for configuration
	software running on a PC.
LPM	Lightning Protection Module; a device that provides lightning and power surge protection
	for ROCs.
LRC	Longitudinal Redundancy Checking error checking.
Issued Mar-06	Glossary	A-4