Control Analog Input PLC

An analoginput is an input signal that has a continuous signal. Typical analog inputsmay vary from 0 to 20 milliamps, 4 to 20 milliamps, or 0 to 10 volts. In thefollowing example, a level transmitter monitors the level of liquid in a tank.Depending on the level transmitter, the signal to the PLC can either increaseor decrease as the level increases or decreases. 

read more "Control Analog Input PLC"

Control Discrete Input PLC

Adiscrete input, also referred to as a digital input, is an input that is eitherin an ON or OFF condition. Pushbuttons, toggle switches, limit switches,proximity switches, and contact closures are examples of discrete sensors whichare connected to the PLCs discrete or digital inputs. In the ON condition adiscrete input may be referred to as a logic 1 or a logic high. In the OFFcondition a discrete input may be referred to as a logic 0 or a logic low.

read more "Control Discrete Input PLC"

Control Sensor With Programmable Logic Controller (PLC)

The language of PLCs consists of a commonly used set of terms; many of which are unique to PLCs. In order to understand the ideas and concepts of PLCs, an understanding of these terms is necessary.

Sensor With PLC

Sensor :  A sensor is a device that converts a physical condition into an electrical signal for use by the PLC. Sensors are connected to the input of a PLC. A pushbutton is one example of a sensor that is connected to the PLC input. An electrical signal is sent from the pushbutton to the PLC indicating the condition (open/ closed) of the pushbutton contacts.

read more "Control Sensor With Programmable Logic Controller (PLC)"

Control Basic PLC

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.This course is meant to supply you with basic information on the functions and configurations of PLCs

Interface PLC

Basic PLC Operation     PLCs consist of input modules or points, a Central Processing Unit (CPU), and output modules or points. An input accepts a variety of digital or analog signals from various field devices (sensors) and converts them into a logic signal that can be used by the CPU.The CPU makes decisions and executes control instructions based on program instructions in memory. Output modules convert control instructions from the CPU into a digital or analog signal that can be used to control various field devices (actuators). A programming device is used to input the desired instructions.These instructions determine what the PLC will do for a specific input. An operator interface device allows process information to be displayed and new control parameters to be entered

read more "Control Basic PLC"

Control Video Lecture Industrial Automation and Control - PLC and Sequence Control, RLL, Structured Design

Lecture Video Introduction to Sequence Control, PLC , RLL



Lecture Video Sequence Control. Scan Cycle,Simple RLL Programs



Lecture Video Sequence Control More RLL Elements RLL Syntax




Lecture Video A Structured Design Approach to Sequence




Lecture Video PLC Hardware Environment

read more "Control Video Lecture Industrial Automation and Control - PLC and Sequence Control, RLL, Structured Design"

Control Introducing of PLC (Programmable Logic Controller)

At former epoch, before PLC is found, control systems at industry applies conventional network, which in the form of network relay. By using this network, we require many places and many components, besides need many cables also to string up it is and many releasing cost that is big enough to make a conventional control system.

PLC in finding around year of 1968 and company that is firstly makes is Schneider electric by the name of MODICON (Digital Modular of Controller). After the time/date of that is automation network many changes, and increasingly simple. As according to the name, this controller earns in program to apply logic, it is of course understandable logic by PLC. Logic that is most popular and many in using in PLC is Ladder logic, or doorstep logic. very Popular doorstep logic, because is adaptation from contact logic and relay. If you understood about contact logic and relay, you are not too difficult to comprehend programming PLC. Here also applies ladder logic program PLC to. In general usage of unlimited PLC, now control PLC is not merely limited to control ON/OFF (digital/discrete), PLC here and now can control magnitude (analogue) for example motor speed, level tank, big value of aperture valve and others. At the moment PLC often applied for controller sequential, and monitoring plant.

Sequential Control/ Drum sequencer
PLC ahead created to make control sequential or drum sequencer, which if using network relay and timer, hence inefficient. Mean a lot of relay and timer require, depends on how many step at the sequence (drum sequencer I debate later). If would apply PLC, enough one PLC, relay and timer can be replaced with software in PLC. ‘PLC can replace relay and timer', because PLC has relay and timer virtual in it.'

Monitoring Plant
PLC is also able to be applied as one of component for monitoring plant. Ably its receiving magnitude value data from sensor/transmitter. as well as can communicate with other peripheral, hence by connecting PLC with HMI (Human machine Interface), we can monitor condition of plant. now a lot of producer HMI, started from only sells software only, until selling its(the hardware is also, and most HMI now supports communications with Merk PLC distinguised like mho, Omron, and others. One Of Merk HMI which distinguised is: WinCC (mho), Wonder ware, Proface, LG, and others. Usually producer PLC produces also its(the HMI.

read more "Control Introducing of PLC (Programmable Logic Controller)"