Labeling Dictionary

Labeling systems dictionary

Labeling Dictionary D

D/A - Converter
Short for digital-to-analog converter. This is a device that changes a digitally coded word into its equivalent quantized analog voltage or current. Just like the A/D device, there are very high-speed D/A's available, capable of converting at data rates up to 1 GHz.
DAC (Digital-to-Analog Converter)
An electronic device, often an integrated circuit, that converts a digital number into a corresponding analog voltage or current.
All information of computer operations directed by the detailed instructions of the program.
Data acquisition
A term commonly used for equipment or software that gathers data from devices through a communications channel.
Data acquisition system
Any instrument or computer that acquires data from sensors via amplifiers, multiplexers, and any necessary analog to digital converters.
Data collection
The act of bringing data from remote points to a central location, and its organization into understandable information.
Data Highway
The proprietary data network used by Allen Bradley PLCs to communicate information to and from other PLCs on the network or to and from host computers attached to the network.
Datalase coding
The label is printed with a Datalase ink. The equipment prints on the Datalase patch, in-line, with a standard CO2 laser.
Data Management
The process by which the reliability, timeliness and accessibility of an organization's data base is assured.
Data Matrix Code
A Data Matrix code is a two-dimensional matrix barcode consisting of black and white "cells" or modules arranged in either a square or rectangular pattern
A collection of structured information.
Database Management Systems access data stored in a database and present multiple data views to end users and application programmers.
Abbreviation for direct current; an electric current flowing in one direction only and substantially constant in value.
See Detailed design specification (DDS).
A  methodical process of finding and reducing the number of bugs, or defects, in a custom automation system, a computer program, or a piece of electronic hardware thus making it behave as expected. The effort expended to start a new system to do what it is designed to do. For a piece of custom automated equipment, the debug begins when the system is powered up for the first time.
Decibel (dB)
(1) A unit for measuring the relative strength of signal power. The number of decibels equals ten times the logarith (base 10) of the ration of the measured signal power to a reference power. One tenth of a bell. (2) 20 times the log to the base 10 of the ratio of two voltages. Every 20 dBs correspond to a voltage ratio of 10, every 10 dBs to a voltage ratio of 3.162. For instance, a CMR of 120 dB provides voltage noise rejection of 1,000,000/1. An NMR of 70 dB provides voltage noise rejection of 3,162/1.
Decline conveyor
A conveyor transporting down a slope.
Default value
The option taken by a computer in the event of the omission of a definite instruction or action.
Degree of decline
Angle of slope (in degrees that a conveyor is installed.
Anything that the builder is expected to provide to or convey to the buyer. Normally these deliverables will be stated in the contract or URS including equipment, documentation, training, and start-up.
The time defined when the buyer of a piece of custom automated equipment or automated system receives what is contracted for. Delivery can also refer to various contract milestones. Typically, delivery is the time the equipment is expected to be delivered to the buyer's dock.
Level of power supplied from the electric system during a specific period of time.
Design for manufacturability and assembly
A simultaneous engineering process designed to optimize the relationship between design function, manufacturability, and ease of assembly.
Design qualification (DQ)
Demonstrates that the proposed design (or the existing design for an off-the-shelf item) will satisfy all the requirements that are defined and detailed in the User Requirements Specification (URS). Satisfactory execution of the DQ is a mandatory requirement before construction (or procurement) of the new design can be authorised.
Design review
A documented, comprehensive, systematic examination of a design to evaluate the adequacy of the design requirements, to evaluate the capability of the design to meet these requirements, and to identify problems.
Detailed design specification (DDS)
The DDS describes how a system is to be built. It takes the requirements and translates them into hardware and software design.
Deterministic model
A mathematical model that, given a set of input data, produces a single output or a single set of outputs.
Development tools
The raw materials by which programmers create custom-built enterprise software.
The difference between an observation and a fixed value.
Device driver
A software component that permits a computer system to communicate with a device.
A low-cost communication link that connects industrial devices to a network. It is based on broadcast-oriented communication protocol - the Controller Area Network (CAN). Visit for more information.
Acronym for Design For Manufacturability/Design For Assembly. The effort expended by a custom automation machine manufacturer or supplier to ensure that a product being considered is correctly configured for economical and efficient manufacture for the specified or anticipated level of production.
Digital input
An input signal between the sensors and actuators of the "real world" and a control system.
Digital output
An output signal between a control system and the sensors and actuators of the "real world."
Digital Signal Processor (DSP)
An integrated circuit designed for high-speed data manipulations. Used in audio, communications, image manipulation, and other data-acquisition and data-control applications.
A set of German standards recognized throughout the world. The 1/8 DIN standard for panel meters specifies an outer bezel dimension of 96 x 48 mm and a panel cutout of 92 x 45 mm.
Discharge End
Location at which objects are removed from the conveyor.
Discrete event simulation
A technique often used by engineers in the design and modification of production systems, whereby models output statistical estimates of performance, using graphic animation to help create a greater understanding of system dynamics.
The measured distance traveled by a point from its position at rest. Peak to peak displacement is the total measured movement of a vibrating point between its positive and negative extremes. Measurement units expressed as inches or millinches.
Distributed system
A system consisting of a group of connected computers sharing software, information or load.
Document management system (DMS)
Allows users to store, search, and manipulate documents electronically and to maintain a library of text and images in a compact space. Most systems also provide a means for passing documents across a network.
Double pitch chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the pitch which is twice standard.
(1) Any time a system is not able to be used for production. This term normally is used to refer to time that the system should be running, but is not due to some problem or failure. (2) Periods where computers, equipment, or manufacturing systems are not available to perform work, either on a scheduled basis or due to unforeseen causes such as breakdown.
An assembly of the necessary structural, mechanical and electrical parts which provide the motive power for a conveyor or a machine.
Drive Belt
A belt which is used to transmit power or motion from one part to another.
Drive Chain
A chain used to transmit power or motion from one part to another.
Drive Shaft
A main driving shaft on a which conveyor sprockets, gears, or pulleys are mounted. This shaft is connected to the drive unit through a coupling, sprocket, gear, or other form of mechanical power transmission.
Driven Roller
Any carrying roller driven by belting, chain or other propelling medium.
Dry rooms
Dry rooms are engineered to the customer's specific requirements for the purpose of controlling temperature, to achieve low dewpoint control for moisture sensitive material processing (such as Lithium batteries), and attain classification of cleanliness (such as specific Pharmaceutical manufacturing requirements).
See Digital Signal Processor.
Dual Element Sensor
A sensor assembly with two independent sensing elements.
Dwell time
The period during which a dynamic process remains halted in order that another process may occur.

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