Filter
Top Products
ROC827 Instruction Manual
Issued Mar-06 Glossary A-1
Appendix A – Glossary
Note: This is a generalized glossary of terms. Not all the terms may
necessarily correspond to the particular device or software described in
this manual. For that reason, the term “ROC” is used to identify all
varieties of Remote Operations Controllers (including ROC800-Series,
ROC300-Series, FloBoss
™
100-Series, FloBoss 300-Series, FloBoss 500-
Series, and FloBoss 407 units).
A
A/D
Analog to Digital signal conversion.
ABS
Acrylonitrile Butadiene Styrene.
ADC
Analog to Digital Converter. Used to convert analog inputs (AI) to a format the flow
computer can use.
AGA
American Gas Association. A professional organization that oversees the AGA3 (orifice),
AGA5 (heating value), AGA7 (turbine), AGA8 (compressibility), and AGA11 (ultrasonic)
gas flow calculation standards. See http://www.aga.org.
AWG
American Wire Gauge.
AI
Analog Input.
AO
Analog Output.
Analog
Analog data is represented by a continuous variable, such as an electrical current signal.
AP
Absolute Pressure.
API
American Petroleum Institute. See http://www.api.org.
Area
A user-defined grouping of database entities.
ASCII
American (National) 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
BMV
Base Multiplier Value, used in AGA7 (turbine) calculations.
BPS
Bits Per Second, associated with baud rate.
BTU
British Thermal Unit, a measure of heat energy.
Built-in I/O
I/O channels that are fabricated into the ROC and do not require a separate option. Also
called “on-board” I/O.
C
C1D2
Class 1, Division 2 hazardous area
CMOS
Complementary Metal Oxide Semiconductor, a type of microprocessor used in a ROC.
Coil
Digital output, a bit to be cleared or set.
COL
Ethernet Packet Collision.
COM
Communications port on a personal computer (PC).
COMM
Communications port on a ROC used for host communications. .
Note: On FloBoss 500-Series and FloBoss 407s, COMM1 is built-in for RS-232 serial
communications.