EXPERIMENT– 1 AIM: To study the terminology and LADSIM ... · PDF fileAim -To study the...

EXPERIMENT– 1

AIM: To study the terminology and LADSIM software and develop simple basic circuits on

software using input and output and develop AND, OR, and Not circuits.

SOFTWARE REQUIREMENT: LADSIM software

THEORY: LADSIM stands for LADDER SIMULATOR, is a fully-functional Ladder Logic

Editor and PLC Simulator that incorporates all the basic functions used in PLC Programming.

With Inputs, Outputs, Timers, Counters, Flags and Shift Registers available, we can develop

ladder programs quickly and easily. Each function is simply 'dragged' onto the ladder rung with

name tags assigned via a pop-up window. Extra rungs can be added with the click of a button,

together with branches to form more complex programs.

LADSIM incorporates seven 'real' process simulations that will test our understanding of Ladder

Logic Programming. For each simulation we must develop the necessary ladder code to effect

safe control of the scenario. The simulations provided within LADSIM are a Traffic Light,

Annunciator, Car Park, Lift, Drinks Machine, Packing Line and Bottling Plant. While LADSIM

can be used as a stand-alone teaching aid with its library of internal simulations, it also has the

added benefit of being capable of controlling external applications via one of our PC Internal

Interface cards.

The LADSIM Editing Screen

The main screen of LADSIM is where the main ladder program is created.

1. The Ladder Logic Diagram Window: This is where the ladder code is displayed. Each

time you add or edit a rung, the result will be shown here.

Fig1. Ladder logic diagram

2. The Controls box: This contains the ladder symbols that are used to create the ladder

diagram. See below for further details.

Fig2. Control box

3. The toolbar: This includes the standard buttons of LADSIM and allows you to start a

new diagram, open an existing file, print, save and comment your ladder diagram.

Fig3. Tool bar

The LADSIM Controls

1. Ladder logic programs are made up of symbols that represent the various inputs and

outputs of the plant equipment we wish to control. LADSIM uses the same symbols to

produce the ladder code on screen and each one is defined below :

2. LADSIM features a total 12 inputs, 12 outputs, 8 timers, 16 counters, 16 flags, 4 shift

registers and 12 reset functions for the timers and counters.

Creating a Ladder Diagram

1. A ladder diagram can be quickly generated by 'dragging' the required controls from the

control panel and dropping them on the rung. In LADSIM, once we have dropped a

control onto a rung, a box appears where we can enter information about that control.

Fig4. Dragging a rung

Testing your Diagrams

Once you have created a piece of ladder code it is important to ensure its correct operation before

applying it to a real control problem. LADSIM has a unique testing facility built into the package

so you can test and debug the ladder programs created in LADSIM.

The Debugging Simulator is activated by clicking on the simulate button or the debugger from

the simulate menu. LADSIM's debugging simulator gives you access to the various inputs used

in your program. Here you are able to force the inputs simply by clicking on the button and

examining the result. All the information provided will help with the debugging and testing of

your ladder diagram within a safe environment.

Fig5. Debuggig simulator

PROCEDURE: Following are the steps to be followed to create AND, OR and NOT

LADSIM software:

AND Gate: The AND gate is a basic digital

behaves according to the truth table

inputs to the AND gate are HIGH (1). If neither or only one input to the AND gate is HIGH, a

LOW output results. In an

the minimum between two binary digits, just as the

the output is always 0 except when all the input

The AND gate with inputs

the logical expression

STEPS:

a) Open the LADSIM software. Go to the toolbar, click file tab and

select new.

b) Now the ladder logic diagram window will be open. From control box select “add

rung”. A new rung is added to the

c) After adding rung go to the controls where we will see the symbols of inputs, outputs

etc. select input with symbo

d) When we place the input in the space a new window will open showing the input

name. Select the new input as input0.

Following are the steps to be followed to create AND, OR and NOT

is a basic digital logic gate that implements logical conjunction

truth table given below. A HIGH output (1) results only if both the


LOW output results. In another sense, the function of AND effectively finds

between two binary digits, just as the OR function finds the maximum

the output is always 0 except when all the inputs are 1s.

The AND gate with inputs A and B and output C implements

the logical expression .

Open the LADSIM software. Go to the toolbar, click file tab and

Now the ladder logic diagram window will be open. From control box select “add

A new rung is added to the ladder logic diagram space.

After adding rung go to the controls where we will see the symbols of inputs, outputs

etc. select input with symbol“ ” as input and drag it to the rung named “rung 0”.

When we place the input in the space a new window will open showing the input


INPUT

A

0

0

1

1

Following are the steps to be followed to create AND, OR and NOT circuits in

logical conjunction - it

. A HIGH output (1) results only if both the


other sense, the function of AND effectively finds

maximum. Therefore,



” as input and drag it to the rung named “rung 0”.


INPUT OUTPUT

A B A.B

0 0 0

0 1 0

1 0 0

1 1 1

e) Again repeat the step (C), and (d). Name the new input as input1. The new input

input1 is placed in series with the input0.

f) Now from the controls table select and drag the output symbol “ ” to the rung0.

A new window will be open showing various outputs, select the output0.

g) Now go to the control table and press the button “ ” to open the debugging

simulator window.

h) Close the input0 and input1 together to get an output. The high output is indicated by

the red signal.

OR Gate: The OR gate is a digital

according to the truth table given below.

the gate are HIGH (1). If neither input is high, a LOW output (0) results. In another sense, the

function of OR effectively finds the

complementary AND function finds the

The

output Q implements the logical expression

STEPS:

a) Open the LADSIM software. Go to the toolbar, click file tab and select new.

b) Now the ladder logic diagram window will be open. From control box select “add

rung”. A new rung is added to the ladder logic diagram space.

c) After adding rung go to the controls w

etc. select input with symbol“



is a digital logic gate that implements logical disjunction

given below. A HIGH output (1) results if one or both the inputs to


function of OR effectively finds the maximum between two binary digits, just as the

function finds the minimum.

The OR gate with inputs A and B and

implements the logical expression Q = A+B.

Open the LADSIM software. Go to the toolbar, click file tab and select new.







INPUT

A

0

0

1

1

logical disjunction - it behaves

GH output (1) results if one or both the inputs to


between two binary digits, just as the



here we will see the symbols of inputs, outputs



INPUT

A B

OUTPUT

A + B

0 0 0

0 1 1

1 0 1

1 1 1

e) Again repeat the step (c), and (d). Name the new input as input1. The new input

input1 is placed in parallel with the input0.

f) To place new input parallel to the previous one, select from the control

box, and specifies the location of the new branch as per the given fig below.

g) Now from the controls table select and drag the output symbol “ ” to the rung0.


h) Now go to the control table and press the button “ ” to open the debugging

simulator window.

i) Close either the input0 or input1 to get an output. The high output is indicated by the

red signal.

NOT Gate: In digital logic, an inverter

negation. The truth table is shown on the right.

The NOT gate with inputs

output OUT implements the logical expression

STEPS:

a) Open the LADSIM software. Go to the toolbar, click file tab and select new.

b) Now the ladder logic diagram window will be open. From control box


c) After adding rung go to the controls where we will see the symbols of inputs, outputs

etc. select input with symbol“



inverter or NOT gate is a logic gate which implements

is shown on the right.

gate with inputs A and

implements the logical expression OUT = NOT A.


Now the ladder logic diagram window will be open. From control box




the input in the space a new window will open showing the input


INPUT

which implements logical





the input in the space a new window will open showing the input

INPUT OUTPUT

A NOT A

0 1

1 0

e) Now from the controls table select and drag the output symbol “ ” to the rung0.


f) Now go to the control table and press the button “ ” to open the debugging

simulator window.

g) Close the input0 and the output is always low. The low output is indicated by the

black signal. As soon as the input is open the output is high, and the high signal is

shown by the red signal.

RESULT: The terminology and LADSIM software is studied and simple basic circuits

AND, OR, NOT on software using input and output were developed.

EXPERIMENT-2

Aim-To study the use of latch, timers , counters ,BSR,BSL in LADSIM Software.

Equipment\Hardware Required-Networked Computer

Software Requirement-LADSIM Software

Theory-Latch is a retentive output instruction. Latch can only turn on a bit. This instruction is

usually used with Unlatch with both Latch and Unlatch addressing the same bit. Actuating the

latch input turns the function on or causes it to change state. The function then stays on even if

the latch input is turned off. To turn the function off, another input must unlatch which turns the

function off.

With timers, counters one can edit their ladder code easily and quickly. A counter might be used

to count up or count down and then activate a contact. When counting down, you must also enter

a number in the accumulator equal to or smaller than the count. The contacts close when the

accumulator is decremented to zero. When counting up, you should have zero in the accumulator

and the contacts close when the accumulator is incremented to the same value as the number of

preset counts. Each time a BSR( bit shift right) is done with bit 15 being replaced by a 0, the

binary number is divided by two.

If BSL is used (Bit Shift Left), all the bits are shifted left with the LSB being replaced by a zero,

the binary value is doubled.

Using LADSIM diagram, this is a sample program using branches . The screenshots of the ladder

program are shown below.

The output of the above program is shown below

TIMERS

Timer are used in Ladder programming in Rungs and a preset value is fed into it. These are used

to delay the proogress from the current rung to the next rung by the preset seconds.

A sample program in which timer was used is shown in the figure below.

The output of the above program is shown below.

COUNTERS

As tha name suggests, counters are used to count. They are mainly employed in industries in

which we have to perform counting function.eg. in conveyor belts where the number of goods

passing through that conveyor belt are counted.

In LADSIM a preset value is fed into the counter after which it is reset. A sample program with

output using counter is set and reset position is shown below.

SHIFT REGISTERS

Another facility available in LADSIM package is the Shift Register, this function uses a 16 bit

word in its operation. There are two type of shift registers in ladsim (BSR) and (BSL). Each time

a BSR( bit shift right) is done with bit 15 being replaced by a 0, the binary number is divided

by two.

If BSL is used (Bit Shift Left), all the bits are shifted left with the LSB being replaced by a zero,

the binary value is doubled. The program and its output is shown in the figure below.

Viva Voice Questions

Q1) What does resetting a Timer mean?

Ans- An ON condition to this function clears all mailbox inputs, outputs, resets all timers to

inactive state, and clears all latched relay bits. All integer variables will be cleared to zeros and

all string variables will be assigned to empty string.

Q2) What advantage does shift register have?

Ans- A shift register may be multidimensional, such that its"data in" and stage outputs are

themselves bit arrays , this is implemented simply by running several shift registers of the same

bit-length in parallel. Shift registers can have both parallel and serial inputs and output.

Q3)How can we use shift registers?

Ans- In digital circuits, a shift register is a cascade of flip flops, sharing the same clock, in which

the output of each flip-flop is connected to the "data" input of the next flip-flop in the chain,

resulting in a circuit that shifts by one position the "bit array" stored in it, shifting in the data .

EXPERIMENT NO. 3

Aim: To study the various pneumatic- and actuation and control valves available in the

laboratory & develop basic circuits A+A-with start-stop buttons& A

+B+A-B-with and without

start-stop buttons.

Equipment: Pneumatic compressor, direction control valves, PU4 tubes, limiting switch

actuators.

Theory: Pneumatic and hydraulic systems use directional control valves to direct the flow of

fluid through a system. They either completely open or completely closes the devices. Such

on/off deices are widely used to develop sequenced control systems.

Common type of directional control valve is the spool valves. Another common form of D.C.

valve is the poppet valve. This valve is normally in the closed condition, there being no

connection between the parts to supply pressure to the system. When the push button is pressed,

the ball is pulled out of the seat and flow across the ports. When the button is released, the spring

forces the ball back up against its seat and so closes off the flow.

There are various ways by which the valves can be actuated, such as: -

• Push button

• By pedal

• By plunges

• By levers

• By roller

• By pneumatic pressure

• By spring

• By solenoid

Solenoid operated valve is actuated by passing a current through a solenoid. Thus is can be used

for electro pneumatic purposes.

Circuit Diagrams/Connections:

Figure 1: Circuit for sequence A+

Figure 2: Circuit for sequence A+B+A

: Circuit for sequence A+A- with Start/Stop switch

: Circuit for sequence A+B+A-B- with Start/Stop switch

with Start/Stop switch

Figure 3: Circuit for

Procedure:

• Sequence A+A- With Start/Stop Switch.

1. The pneumatic circuit is connected as shown in the circuit diagram 1.

2. The compressor is turned on so that air supply is turned on to the pneumatic system.

3. Push the button of the push button valve.

4. The air supply is switched off to cylinder ‘A’ which starts extending.

5. The air is supplied to cylinder ’A’ which starts extending.

6. At the end of extension, cylinder’s piston handle strikes the limiting switch a

7. Limiting switch a+ turns on the right side of the valve.

8. Air is then supplied to the other end of cylinder ‘A’ & it starts compressing.

9. To restart the sequence A+A

• Sequence A+B+A-B- With Start/Stop Switch.


2. Push button is pressed after turning on the compressor.

3. The cylinder ‘A’ starts extending and actuates limiting switch a

4. This switch activates the left position the valve 3 and cylinder ‘B’ also sta

extending. In this way A

5. Full extension of cylinder ‘B’ activates limiting switch b

position of valves 1 and cylinder ‘A’ starts compressing.

: Circuit for sequence A+B+A-B- without Start/Stop switch

With Start/Stop Switch.

The pneumatic circuit is connected as shown in the circuit diagram 1.

The compressor is turned on so that air supply is turned on to the pneumatic system.

the button of the push button valve.

The air supply is switched off to cylinder ‘A’ which starts extending.

The air is supplied to cylinder ’A’ which starts extending.

At the end of extension, cylinder’s piston handle strikes the limiting switch a

turns on the right side of the valve.

Air is then supplied to the other end of cylinder ‘A’ & it starts compressing.

To restart the sequence A+A-, step 3) to 8) are followed again.

With Start/Stop Switch.

circuit is connected as shown in the circuit diagram 2.

Push button is pressed after turning on the compressor.

The cylinder ‘A’ starts extending and actuates limiting switch a+.

This switch activates the left position the valve 3 and cylinder ‘B’ also sta

extending. In this way A+B+ sequence is obtained.

Full extension of cylinder ‘B’ activates limiting switch b+. This switch activates right

position of valves 1 and cylinder ‘A’ starts compressing.

without Start/Stop switch

The pneumatic circuit is connected as shown in the circuit diagram 1.

The compressor is turned on so that air supply is turned on to the pneumatic system.

At the end of extension, cylinder’s piston handle strikes the limiting switch a+.

Air is then supplied to the other end of cylinder ‘A’ & it starts compressing.

circuit is connected as shown in the circuit diagram 2.

This switch activates the left position the valve 3 and cylinder ‘B’ also starts

. This switch activates right

6. On full compression, limiting switch a- is activated which activates the right portion

of valve 3 and cylinder ‘B’ starts compressing.

7. In this way the sequence A+B+A-B- is completed using push button.

8. To repeat the sequence, push button is pressed again.

• Sequence A+B+A-B- Without Start/Stop Switch.


2. Compressor is turned on.

3. The left position of valve 1 is activated and cylinder ‘A’ starts extending.

4. Limiting switch a+ is activated which activates the left position of valve 2.

5. The cylinder ‘B’ starts extending and on full extension, switch b+ is activated.

6. The right position of the valve 1 activates & cylinder ‘A’ starts compressing.

7. Switch a- is activated and this activates right position of valve 2. Cylinder ‘B’ starts

compressing and the switch b- is activated, this actuates the left position of the valve 1

again.

8. Thus the sequence A+B+A-B- is continuously repeated.

9. To stop the sequence, compressor is turned off.

Result: The sequence A+A- with start-stop buttons & A+B+A-B-with and without start-stop

buttons is obtained using pneumatic kit and direction control valves.

Precautions:

1. The connecting pipes should not be bent and their length should be minimum.

2. Compressor should have a safety valve and a pressure gauge.

3. PU4 tubes should not be pulled without unlocking the connectors.

Experiment no.- 4

AIM

To develop an electro pneumatic circuit of the given sequence A+ A

- on the electro pneumatic

using solenoid operated valves and relay switches.

EQUIPMENTS

Pneumatic compressors, direction control valves, relay switches, connecting wires, PU4 tubes.

THEORY

Relays are electrically operated switches in which changing a current in one electric circuit

switches a current ON/OFF in another circuit. Relays are often used in control systems because

relays are inductances, they can generate a back voltage when the energising current is switched

OFF or when their input switches from a high to low signal. To overcome this problem, a diode

is connected across the relay. When the back emf occurs, the diode conducts and shorts it out.

Such a diode is termed as free-wheeling or flyback diode.

Time-delay relays are control relays that have a delayed switching action. The time delay is

usually adjustable and can be initiated when a current flows through the relay coil or when it

ceases to flow through the coil.

PROCEDURE:

1. Connect the pneumatic circuit as shown.

2. Connect the electrical circuit as shown.

3. The pneumatic compressor and electrical circuit swtich is turned ON.

4. The left side solenoid is activated initially and cylinder starts extending.

5. Limiting switch A+ is activated which changes the current in the relay coil.

6. The relay coil then activates the right side solenoid and cylinder starts compressing.

7. The limiting switch A- is activated and the current in relay coil is changed again.

8. Relay coil switch the current to the left side solenoid and the sequence A+A

- is repeated

again.

9. To turn OFF the system, electrical switch and the pneumatic compressor is turned OFF.

24/11/2014

R2-DC-2

R2-DC-3

R2-DC-4

R2-DC-5

R2-DC-6

R2-DC-7

R2-DC-8

F

R1-DC-1

R1-DC-2

R1-DC-3

R1-DC-4

R1-DC-5

R1-DC-6

R1-DC-7

R1-DC-8

R1-AC-1

R1-AC-2

R1-AC-3

R1-AC-4

R1-AC-5

R1-AC-6

R1-AC-7

R1-AC-8

R2-AC-1

R2-AC-2

R2-AC-3

R2-AC-4

R2-AC-5

R2-AC-6

R2-AC-7

R2-AC-8

L1

COM

L1

ND

L1

NC

L2

COM

L2

ND

L2

NC

L4

COM

L4

ND

L4

NC

L3

COM

L3

ND

L3

NC

S1

1

S1

2

S2

1

S2

2

R1

R2

ON OFF

AIM: To automate a traffic control unit using LADSIM software

Equipment/Hardware Required:

Software Required:

Circuits:

Procedure:

STEP 1

Open ladsim and make the input and output latch as shown in fig.1.

Fig.1

STEP 2

Then go to add rung and add 1 rung and then add inputs and timer ( set time 5sec) as shown in

fig 2.

Fig. 2

STEP 3

Then go to add rung again and add input (T1/DN) and

latch (OP1) as shown in fig. 3

Fig. 3

STEP 4

Again go to add rung and add the input

EXPERIMENT NO. 5:

To automate a traffic control unit using LADSIM software.

Equipment/Hardware Required: Networked Computer.

LADSIM Software.

Make the circuit as shown in the procedure.

Open ladsim and make the input and output latch as shown in fig.1.


Then go to add rung again and add input (T1/DN) and a reset (T1) and add branch and then add

the input(OP1) and timer (T2 -5sec) as done in fig. 4

Make the circuit as shown in the procedure.


add branch and then add

s done in fig. 4

Fig.4

STEP 5

Then again add rung and add input

then go to add branch and click in between the rung and at the end then go

unlatch and put it in the box as shown in th

rung. And finally the fig will be like the one as shown in the figure 5

Then again add rung and go to controls and add input (OP2)

(T3) at the end and put time-5 sec

Fig. 6

STEP 7

Then again add rung and add input

parallel to the unlatch one and put a reset tool for

Fig. 7

STEP 8

Go to simulation on top left of the window and click on eith

will get the window like this

add rung and add input (T2/DN) and then add unlatch output at the end of rung and

then go to add branch and click in between the rung and at the end then go to controls

ut it in the box as shown in the fig and do it for all the things you want to add in the

rung. And finally the fig will be like the one as shown in the figure 5

Fig.5

STEP 6

d rung and go to controls and add input (OP2) and put it in start and then timer

5 sec.

Then again add rung and add input (T3/DN) and the unlatch (OP2) and then add branch in

parallel to the unlatch one and put a reset tool for T3 as shown in fig. 7

Go to simulation on top left of the window and click on either debugger or traffic

and then add unlatch output at the end of rung and

to controls and drag

things you want to add in the

and put it in start and then timer

add branch in

er debugger or traffic light. and u

Fig. 8

1) How many timers are available in LADSIM?

Ans: There are eight timers available in LADSIM.

2) How many counters are available in LADSIM?

Ans: There are eight counters available in LADSIM.

3) How many flags are there in a LADSIM?

Ans: There are sixteen flags in a LADSIM.

4) How many inputs and outputs are in LADSIM

Ans: There are twelve inputs and outputs in LADSIM.

VIVA VOCE

How many timers are available in LADSIM?

timers available in LADSIM.

How many counters are available in LADSIM?

counters available in LADSIM.

How many flags are there in a LADSIM?

There are sixteen flags in a LADSIM.

How many inputs and outputs are in LADSIM?

There are twelve inputs and outputs in LADSIM.

EXPERIMENT NO.-6

AIM- To program a vinytics make PLC through keypad and develop basic programs to

demonstrate use of inputs , outputs , AND & OR.

EQUIPMENT/HARDWARE REQUIRED- Vinytics make modular PLC , keypad and UPS.

THEORY- A programmable logic controller, PLC or programmable controller is a digital

computer used for automation of typically industrial electromechanical processes, such as control

of machinery on factory assembly lines, amusement rides, or light fixtures. PLCs are used in

many industries and machines. PLCs are designed for multiple analogue and digital inputs and

output arrangements, extended temperature ranges, immunity to electrical noise, and resistance

to vibration and impact. Programs to control machine operation are typically stored in battery-

backed-up or non-volatile memory. A PLC is an example of a "hard" real-time system since

output results must be produced in response to input conditions within a limited time, otherwise

unintended operation will result.

COMMAND DESCRIPTION

The VMC-PLCT has 28 keys and six seven segment displays to communicate with the outside

world. As VMC-PLCT is switched ON , a message “PLC 51” is displayed on the display and all

the keys are in command mode. The keyboard is shown below.

Keyboard description

RESET- resets the system

SHIFT- provides a second level command to all keys

CHK (check)- checks the status of output of only higher stage and if it is lower stage it goes to

next line.

GOTO- unconditional jump to levels

CNT- counter

ANI- AND inverse

RST- reset the input.

LD- inputs

SER(serial command)- for RS232C communication with PC

END- end the program

TIM- timer

EXEC- for execution

COUNT- to set the delays or number of counts in timer and counter

SET- to set the input/output. Once the output is set, it remains high until it is reset

LDI- load inverse

OUT- output

ORI- OR inverse

PRE(previous)- previous is used as a immediate terminator in case of exam memory

NEXT- increments the program counter

ORB- OR block

EXAM(examine memory)- allows user to examine instructions

SEC- second

IL(interlock)- to interlock the execution after any particular command

ILC(interlock clear)- to clear interlock for further execution

EN(enable counter)- to enable the counter

BLANK- this key is used for execution of a command

BM(block move)- allows user to move a block form monitor to RAM area

OR- logical OR

AND- logical AND

0 to 9- numeric keys

If instead of a valid command the user gives a data, then system will display ‘-err’.

SAMPLE PROGRAMS

UNDERSTANDING PROCEDURE OF WRITING PROGRAM LOGICS

Input (either high or low) are given at the input ports (X00-X07 and X10-X17) and the output is

obtained at the ports (Y20-Y27 and Y30-Y37).

Here X00 controls the output port Y20.

Example 1

Implement the following ladder network using PLC.

X00 Y20

PROGRAM

LD 00 NEXT

OUT 20 NEXT

END NEXT BLANK BLANK NEXT EXECUTE

Now, when PLC is connected to the power supply and a +5V is given to the 00 port the

corresponding output port 20 also goes high and the LED glows

LOGIC

Example 2

Implement the following ladder network using PLC

X00 Y20

X01 Y21

Program

LD 00 NEXT

OUT 20 NEXT

LDI 01 NEXT

OUT 21 NEXT


LOGIC

Example 3

Implement the following ladder network using PLC

X00 X01 Y20

X00 X02 Y21

Program

LD OO NEXT

AND 01 NEXT

OUT 20 NEXT

X00 Y20

H

L

H

L

X00 Y20 X01 Y21

ON

OFF

ON

OFF

ON

OFF

OFF

ON

LD 00 NEXT

ANI 02 NEXT

OUT 21 NEXT


LOGIC

X00 X01 X02 Y20 Y21

ON

OFF

ON

OFF

ON

ON

ON

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

Example 4

Implement the following network

X00 Y20

X01

X01

Y21

X02

Program

LD 00 NEXT

OR 01 NEXT

OUT 20 NEXT

LD 01 NEXT

ORI 02 NEXT

OUT 21 NEXT


LOGIC

X00 X01 Y20 X01 X02 Y21

0

0

1

1

0

1

0

1

0

1

1

1

0

1

0

1

0

0

1

1

1

1

0

1

Example 5

Implement the following network

X00 X02 Y20

Program

LD 00 NEXT X01 X03

OR 01 NEXT

LD 02 NEXT

OR 03 NEXT

ANB NEXT

OUT 20 NEXT


LOGIC

Example 6

Implement the following ladder

network using PLC

ORB Y20

X00 X02

Program X01 X03

LD 00 NEXT

AND 02 NEXT

LD 01 NEXT

AND 03 NEXT

ORB NEXT

OUT 20 NEXT


X00 X01 X02 X03 Y20

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

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LOGIC

X00 X01 X02 X03 Y20

ON OFF ON OFF ON

OFF ON OFF ON ON

ON OFF OFF OFF OFF

ON OFF ON OFF OFF

Program 7

LD 00 NEXT

SET 20 NEXT

LD 01 NEXT

RST 20 NEXT


LOGIC

X00 X01 Y20

ON OFF ON

OFF ON OFF

Program 8

LD 00 NEXT

TIM 60 NEXT

# 50 NEXT

LD 60 NEXT

OUT 20 NEXT


LOGIC

X00 TIM60 Y20

ON ON (after 5 sec) ON

EXPERIMENT– 1 AIM: To study the terminology and LADSIM ... · PDF fileAim -To study the...

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Transcript of EXPERIMENT– 1 AIM: To study the terminology and LADSIM ... · PDF fileAim -To study the...