Emerson Fisher FLOBOSS 407, Instruction Manual

Page: 185 / 200

FloBoss 407 Instruction Manual
Rev 5/00 G-1
GLOSSARY OF TERMS
A
A/D — Analog to Digital.
AGA — American Gas Association.
AI — Analog Input.
AO — Analog Output.
Analog — Analog data is represented by a continuous variable, such as a electrical current signal.
AP — Absolute Pressure.
API — American Petroleum Institute.
Area — A user defined grouping of database entities.
ASCII — American Standard Code for Information Interchange.
Attribute — A parameter that provides information about an aspect of a database point. For example,
the alarm attribute is an attribute that uniquely identifies the configured value of an alarm.
B
BTU — British Thermal Unit, a measure of heat energy.
Built-in I/O — I/O channels that are fabricated into the ROC or FloBoss and do not require a
separate module. Also called “on-board” I/O.
C
COM1 — Communications port on the ROC364 that may be used for host communications. On
the FloBoss 407 and FloBoss 500-series, this Comm port is built-in for RS-232 serial
communications.
COM2 — Communications port on the ROC364 or FloBoss 407 that may be used for host
communications.
COMM — Communications port on the ROC306 or ROC312 that may be used for host
communications.
Configuration — Refers either to the process of setting up the software for a given system or the
result of performing this process. The configuration activity includes editing the database, building
schematic displays and reports, and defining user calculations. Typically, the software setup of a
device that can often be defined and changed. Can also mean the hardware assembly scheme.
CPU — Central Processing Unit.
CRC — Cyclical Redundancy Check.
CSA — Canadian Standards Association.
CTS — Clear to Send modem communications signal.
D
D/A — Digital to Analog.
DB — Database.
dB — Decibel. A unit for expressing the ratio of the magnitudes of two electric signals on a
logarithmic scale.
DCD — Data Carrier Detect modem communications signal. Also, Discrete Control Device — A
discrete control device energizes a set of discrete outputs for a given setpoint and matches the
desired result against a set of discrete inputs.