DL8000 Preset Instruction Manual
Revised February-2016
Glossary
A-5
Input Register
Input numeric value to be read.
I/O
Input/Output.
I/O Module
Module that plugs into an I/O slot on a ROC to provide an I/O channel.
IP-252
Institute of Petroleum
standard 252. A British standard for pulse fidelity and security for
pulse output type flow meters. Program codes 233 and 234 define the operation of this
function.
Note
: Equivalent standard is API Manual of Petroleum Measurement Standards /
Chapter 5 - Metering /
IRQ
Interrupt Request. Hardware address oriented.
ISO
International Standards Organization. See http://www.iso.ch.
IV
Integral Value.
K
KB
Kilobytes.
KHz
KiloHertz.
K-factor
The pulses per unit quantity generated by a pulse output type flow meter (also
system
factor
). The nominal value is determined by flow meter design and factory water flow
calibration. The “average” K-factors for the flow meters are usually indicated on the
flow meter nameplates.
L
LCD
Liquid Crystal Display.
LDP
Local Display Panel, a display-only device that plugs into ROC300 (via a parallel
interface cable) used to access information stored in the ROC.
LED
Light-Emitting Diode.
Load
For sequential blending
: In multi-component blending, a load is the completed
delivery of one component of a batch. The completion of loading all components in the
batch completes the batch delivery. If the recipe only loads one component, a load
corresponds to a batch delivery.
For inline blending:
Each component of the blend is loaded simultaneously.
Depending on the blend ratio, the low-proportion components are loaded completely
during the time that the high proportion component(s) are being loaded. After loading of
the highest proportion component has been terminated, all component loads and the
batch delivery are complete.
Loading Island
Also l
oading rack;
an installation of one or more loading arms or risers used to deliver
liquid components to a tanker vehicle located on one or both sides of the island,
depending on the design of the island.
Loading Riser
The related instruments and devices, located in a meter stream, that provide the liquid
component loading capability to a mobile tanker vehicle.
Note
: The flow meter piping can also be installed horizontally, if desired.)
Load Spot
Also
bay or lane
; one side of a loading island, a position where a tanker vehicle parks
for a loading operation. One load spot can have one or more loading arms.
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.
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.