DL8000 Preset Instruction Manual
A-2 Glossary Revised February-2016
Blending
The process of mixing two or more liquid components to form a composite delivered
stream. The DL8000 controls blending based on a predetermined recipe by either the
sequential (automatic or manual) or the inline (proportional or non-proportional)
method. The quantity of each component in a blend is typically greater than two to four
percent of the blended product. Injection of very small quantities of liquids, less than
four percent of the blended product, is usually controlled by the additive injection
process.
Base Multiplier Value, used in AGA7 (turbine) calculations.
Bits Per Second, associated with baud rate.
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
Class I, Division 2 hazardous area
CF
Compare Flag; stores the Signal Value Discrete (SVD).
Complementary Metal Oxide Semiconductor, a type of microprocessor used in a ROC.
Coil
Digital output, a bit to be cleared or set.
Ethernet Packet Collision.
COM
Communications port on a personal computer (PC).
Communications port on a ROC used for host communications.
Comm Module
Module that plugs into a ROC to provide a channel for communications via a specified
communications protocol, such as EIA-485 (RS-485) or HART.
Component
Any liquid metered and controlled by the DL8000. Liquid hydrocarbons refined from
crude oil and LPGs (such as propane) are usually referred to as products. Components
are base products or tank products stored at a distribution terminal. The component is
measured before being blended with other components. Additives may be injected
before (upstream of) or after (downstream of) the component meter.
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 set up of a device that can often be defined and changed. Can also mean the
hardware assembly scheme.
Configuration
Tree
In ROCLINK 800, the graphical display that appears when a configuration file opens
(also Directory Tree). It is a hierarchical branching (“tree-style”) method for navigating
within the configuration screens.
Central Processing Unit.
CRC
Cyclical Redundancy Check error checking.
Crosstalk
The amount of signal that crosses over between the receive and transmit pairs, and
signal attenuation, which is the amount of signal loss encountered on the Ethernet
segment.
Canadian Standards Association. See http://www.csa.ca.
Carrier Sense Multiple Access with Collision Detection.
Clear to Send modem communications signal.
D
D/A
Digital to Analog signal conversion.
Database.
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