Product life cycle. The phases of a product's life span introduction, growth, maturity and decline.

Product life cycle. The phases of the sales projections or history of a product or service category over time used to assist with marketing mix decisions and strategic options available. The four stages of the product life cycle include introduction, growth, maturity, and decline, and typically follow a predictable pattern based on sales volume over time.

Programmable Logic Controller (PLC) is an industrial device that provides an interface for input sensors and output actuators. PLCs can be programmed using relay ladder logic to control the outputs based on input conditions and / or algorithms contained in the memory of the PLC.

Programmable Logic Controller. Electronic replacement for hard wired relay/timer logic.

Product life cycle. The stages of development and decline through which a successful product typically moves. roduct line: A group of products related to each other by marketing, technical or end-use considerations. roduct mix: All of the products in a seller's total product line.

Programmable Logic Control (PLC): an automation method using relay technology. A microprocessor-based industrial control system. It communicates with other process control components through data links. It is used in process control for simple switching tasks, PID control, complex data manipulation, arithmetic operations, timing and process and machine control.

Programmable Logic Controller. Special-purpose computer which controls most of a roller coaster's functions.

Programmable Logic Controller. A microprocessor based controller programmed to create an analog or digital output based on the status of a particular input or group of inputs. The PLC controls the relays, contactors, solenoids, etc. that operate motors, blowers, valves etc. on the machine. Also used to create a digital output, based on P.I.D. parameters, to modulate a solid-state relay to control current to the electric heaters. An HMI is usually interfaced to the PLC in order for the machine operator to monitor the process and program certain machine and molding parameters.

Stands for "Programmable Logic Controller", a microprocessor-based system used for controlling industrial machinery. These typically accept plug-in Input/Output modules for making connection to sensors and actuators. Most PLCs are programmed using a visual programming technique called "Relay Ladder Logic", developed in the 1960s.

Programmable logic controller; a machine controller that activates relays and other I/O units from a stored program. Additional modules support motion control and other functions.

Programmable logic controller. Computer-based industrial monitoring and control package with applications mostly in the areas of safety, sequential or logical operations, where control actions are based on equipment and alarm status.

Programmable Logic Control Program - A PMAC background task. A PMAC may have up to 32 of these programs, numbered 0 to 31. PLC 0 is used for special purpose - high speed applications. PLCs 1 to 31 execute at a lower priority.

A Programmable Logic Controller controls large numbers of discrete elements using very fast I/O scan times. Today, even the smallest PLCs may be equipped with serial communication and analog control capabilities and perform arithmetic functions. (7/96)

Programmable logic controller; small computer used for automation of processes and machinery.

Programmable Logic Controller. Also known as a programmable controller, these devices are used for machine control and sequencing.

A class of industrially hardened devices that provides hardware interface for input sensors and output actuators. PLCs can be programmed using relay ladder logic to control the outputs based on input conditions and / or algorithms contained in the memory of the PLC.

Product Life Cycle - see Software Product Life Cycle.

(programmable logic controller) A solid state controller for processes. This establishes a sequence of operations which can be changed easily with programming.

Programmable Logic Controller. Control and sequencing systems for automation. Also APC Advanced Process Control. Also Product Life Cycle (Thanks to Stephen Butler). Also Public Limited Company.

Programmable Logic Controller. a device that is pre-programmed to accept relay ladder logic instructions and perform these instructions to control the equipment operation.

Programmable Logic Controller. These computers replace relay logic and usually have PID controllers built into them. PLCs are very fast at processing discrete signals (like a switch condition). The most popular PLC manufacturer's are Allen Bradley, Modicon, GE, and Siemens (or TI).

A common acronym for Programmable Logic Controller. A PLC is the heart of Chart's newest innovation, the CTI2000 chamber controller. PLCs have proven to be a very reliable, flexible, cost effective, high performance control solution in many diverse applications.

Programmable Logic Controller device used to control machines. Takes the place of relays, timers, clocks, and counters.

A Programmable Logic Controller is a controller which stores instructions to command a device, such as a valve, to which it is connected to start up, operate and shut down.

Programmable Logic Controller. A microcomputer-based control device. A solid-state control system which receives inputs from user-supplied control devices such as switches and sensors, implements them in a precise pattern determined by instructions stored in the PLC memory, and provides outputs for control or user-supplied devices such as relays and motor starters.

programmable logic controller. a control device, normally used in industrial control applications, that employs the hardware architecture of a computer and a programming language

Programmable logic controller. A highly reliable special-purpose computer used in industrial monitoring and control applications. PLCs typically have proprietary programming and networking protocols, and special-purpose digital and analog I/O ports.

(Programmable Logic Controller) A control device, usually used in industrial control applications, that employs the hardware architecture of a computer and relay ladder diagram language. Inputs to PLCs can originate from many sources including sensors and the outputs of other logic devices. Banner sensors and logic devices are all designed for ease of interfacing to PLCs. Also called "programmable controller."

abbrev. Product Life Cycle

Programmable Logic Controller. A device using programmed, custom instructions to provide automated monitoring and control functions by evaluating a set of inputs and driving a set of outputs. Used to automate complex functions in machining, packaging, materials handling and other applications.

A type of industrial controller. Originally, industrial automation was implemented with discrete relays and timers, which were connected together with copper wire. Using this type of automation structure had a serious disadvantage: to change the function (or logic) of the control system, the system had to be literally re-wired. Re-wiring is time-consuming and expensive. PLCs were invented to replace these banks of relays in semi-automated factories, notably automobile plants in the late 1960s. The programming method that most PLCs use is called ladder logic. Scan rates are critical for a PLC, because PLCs constantly read (scan) all points, process logic, and then write to all points. Most PLCs run on a proprietary network. Contrast with PAC (programmable automation controller).

abbreviaton for Powerline Communications.

Power line communications, an alternative acronym for PLT, see below.

PLC stands for Power Line Communications, the use of the existing utility power grid as the medium to send broadband data communications. In theory, plugging a computer device into an existing power outlet would connect the user to the Internet by tapping into already established national and global power grid networks. PLC is not a wireless technology. See BPL.

Power line communications, describes all communications over power lines including BPL and lower speed services, too

Power Line Carrier (2)

A technology that makes it possible to use the power lines of energy distribution grids (electrical networks) as a means of voice or data transmission. The electrical network becomes a means of communication.

patrol leaders' council. SPL, ASPLs and PLs of a Boy Scout troop meet to plan troop program.

Patrol Leaders Council. Made up of the youth leadership of the troop. They meet once a month to plan the following months activities and annually to plan the upcoming year.

Program Leadership Committee

(Palestine Legislative Council)- Officially, the chief lawmaking body of the Palestine National Authority.

Public Limited Company. A type of company incorporated by registration under the Companies Act which may offer its shares to the public (a private company cannot do this) and is subject to a number of additional requirements under the Companies Act.

A Public Limited Company in the UK is a company limited by shares and having an authorised share capital of not less than £50,000.

public limited company (Inc.)

To be a plc (Public Limited Company), the company's constitution must state that it is such, specifically expressing the words 'Public Limited Company' more

Public Limited Company. A company becomes public when it issues shares to the public. A company must be public to be listed on the London Stock Exchange or the Alternative Investment Market (AIM).

Public limited company. A company which has shares that can be purchased by the public and which has a share capital not less than a statutory minimum. Not all plcs are listed companies.

Public limited company. A company whose shares are offered to the general public and traded freely on the open market and whose share capital is not less than a statutory minimum.

Public Limited Company. As opposed to private, a company is public after it issues partial ownership of itself, in the form of shares, to the public. Only plcs can be listed on the stock exchanges.

Public limited company. A company whose shares may be purchased by the public and whose share capital is not less than a statutory minimum. Not all plcs are listed companies.

Public Limited Company - A company that has shares available for the public to buy.

Public Limited Company. Denotes any company which has share capital of at least a fixed amount.

Peak Load Contribution. A customers contribution to a zone's normalized summer peak load, as estimated by the zone's Electrical Distribution Company (EDC). PLC is used to determine a Load Serving Entity's (LSE's) Obligation peak load.

Public limited company - shares are available to the public on the stock market.

Public limited company. The shares of such company may be offered for sale to the general public and members' liability is limited to the amount unpaid on shares held by them.

Public Limited Company. A company that offers a proportion of its share capital to the public. Only plcs can be listed on stock exchanges.

public limited company. a successful, established company that is allowed to offer its shares for sale on the open stock market.

A UK public limited company.

Public Limited Company. A public company limited by shares and having a share capital, and which may offer shares for purchase by the general public. Only PLC’s may qualify for listing or trading on the USM on the London Stock Exchange.

Public Limited Company. A company whose shares may be purchased by the public and traded freely on the open market and whose share capital is not less than a statutory minimum.

A PLC (Public Limited Company) is distinct from a private company in that it is designed for wider share ownership and hence the administrative regime is tighter but the company can offer shares to the public and is capable of being listed.