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 Coding Step Respon In Mathlab

It is tutorial how to making listing step Respon in Software Matlab..
1. Open Mathlab

2. File .
        M file
Inside code   exsample

m=2;

b=5;

k=3;

A=[0 1;-k/m -b/m];

B=[0;1/m];

C=[1 0];

D=0;

state_space=ss(A,B,C,D)

press F5 

a =

        x1    x2

  x1     0     1

  x2  -1.5  -2.5

b =

       u1

  x1    0

  x2  0.5

c =

      x1  x2

  y1   1   0

d =

      u1

  y1   0

>> [A,B,C,D]=ssdata(state_space)

A =

        0    1.0000

  -1.5000   -2.5000

B =

        0

   0.5000

C =

    1     0

D =

    0

>> step(state_space)

you get it

And find transfer function you can make it.

>> tutorial_tf=tf(state_space)

Transfer function:

      0.5

-----------------

s^2 + 2.5 s + 1.5

>> 

read more "Control Coding Step Respon In Mathlab"