Despite the great technological advancement experienced in recent years,
Programmable Logic Controllers (PLC) are still used in many applications from the real
world and still play a central role in infrastructure of industrial automation. PLC operate in
the factory-floor level and are responsible typically for implementing logical control,
regulatory control strategies, such as PID and fuzzy-based algorithms, and safety logics.
Usually PLC are interconnected with the supervision level through communication
network, such as Ethernet networks, in order to work in an integrated form....
Programmable Logic Controllers (PLCs), also referred to as
programmable controllers, are in the computer family. They are
used in commercial and industrial applications. A PLC monitors
inputs, makes decisions based on its program, and controls
outputs to automate a process or machine.
A PLC or programmable controller is a computer based solid state device that controls industrial equipment and processes.
Initially designed to perform the logic functions executed by relays, drum switches and mechanical timer/counters, it has
been extended to analog control as well.
A typical PLC system consists of a processor and an input/output system all mounted in a rack like system. The PLC system
is a cost effective solution for applications with a high ratio of digital to analog points in a system.
Ethernet Communication: Data Exchange S7-1200 S7-1200
The application examples are not binding and do not claim to be complete regarding the circuits shown, equipping and any eventuality. The application examples do not represent customer-specific solutions. They are only intended to provide support for typical applications. You are responsible for ensuring that the described products are correctly used. These application examples do not relieve you of the responsibility of safely and professionally using, installing, operating and servicing equipment.
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Truong Dinh Chau, Ph.D Department of Automation & Control, Automation Design Center, 109 B3 Ho Chi Minh City Univ. of Tech. Cell phone: +84 (0)91-543-74-40 Email: email@example.com Truong-Dinh.Chau@schneider-electric.com
Ladder Diagram Fundamentals 1-5. Machine Control Terminology
There are some words that are used in machine control systems that have special meanings. For safety purposes, the use of these words is explicit and can have no other meaning. They are generally used when naming control circuits, labeling switch positions on control panels, and describing modes of operation of the machine. A list of some of the more important of these terms appears below. ON This is a machine state in which power is applied to the machine and to the machine control circuits. The machine is ready to RUN. This is...
A PLC (i.e. Programmable Logic Controller) is a device that was invented to replace the necessary sequential relay circuits for machine control. The PLC works by looking at its inputs and depending upon their state, turning on/off its outputs. The user enters a program, usually via software, that gives the desired results.
PLCs are used in many "real world" applications. If there is industry present, chances are good that there is a plc present.
DC drives are widely used in applications that require regeneration, precise speed control, dynamic performance, and constant torque over wide speed ranges. The Mentor II delivers the universal DC drive solution. Simple stand-alone applications are easily configured to control motor speed, voltage or current using standard internal settings. Set-up is convenient using the drive keypad, CTKP remote keypad, or MentorSoft, a Windows based drive configuration tool. The Mentor II has extensive diagnostic and communication abilities that enhance system reliability.
DC systems drive in the world
The Mentor ll provides a wide power range of fully programmable DC drives with a unified control interface. Simple stand-alone applications are quickly configured with a minimum of parameters. Add the application module (MD29) to implement high performance drive systems with local intelligence. This intelligence can then be utilised to eliminate the master PLC by constructing a distributed control system, using the CTNet fieldbus with the System Programming Tool (SYPT).