PLC 04: OFF Load on Counter 10 in LogixPro Simulator

 

We are sharing PLC Programming and Simulation series.

PLC Lab 04:

Now here we are sharing one more Lab experiment "OFF Load on counter 10" using LogixPro Simulator.

In previous lab we do ON load on counter 10 Now we will see how we can do OFF Load on Counter 10? and Load will ON when we will start our program.

For this experiment we chose the Silo Simulator of LogixPro which very interesting for learners.

 

Scenario: 

In this Simulator we will use just PROX SENSOR as input for PLC and motor as out put and Box is object which will interrupt the PLC counter and counter will count. 

In start motor will run and box pass through PROX SENSOR and sensor will give the interruption to PLC. When PLC counter reach at 10, it will stop the motor. 

Ladder Diagram:

Here is the Ladder diagram of the above problem.

we select NO (Normally Open) switch to associate with external PROX SENSOR and use a CTU (Counter UP).

In 2nd line we use a NC (Normally Close) switch which's is counter dependent, when counter will reach to the given preset value this NC switch will open and stop the motor.

If you feel any problem then Comment me plz

Previous LABs:

LogixPro Software 

Ladder Logic Symbols

Ladder Logic Rules

Ladder of Basic Logic Gates

Ladder of Exclusive Logic Gates 

Latching the output

Unlatching the output

ON the Load at Counter 10

To ON the Load at Counter value 10 in LogixPro

 

Hi here is one more and a NEW Lab of Counter in LogixPro for PLC programming. Its very helpful to make different conditional based ladder logics.

Here we are explaining today with video.

How to use counter in LogixPro ?

Download LogixPro

Topic is to :: ON the Load at counter value 10

In this logic we will use one external push button to press multiple time or we will use any sensor which can detect any interruption and PLC counter will count that interruptions and On the load after given predefine number of counting in counter.

If you cant understand how to use LogixPro then you can watch this video.

If you have any question then can ask to me in comments.

More topics:

How to Latch the Load

How to Unlatch the Load

Unlatching function in LogixPro Simulator

 

Unlatching function means to do off and hold the load or Reset the load until latch or set by other push button.

We can make unlatching by using Boolean algebra too. Here I am sharing the Boolean equation for unlatching function.

Download LogixPro Software

As we know 

A + B = Y -----I

Here A and B are inputs but Y is output and this is the function of OR logic.

let make a feed back loop on 2nd input B = Y 

Now the Equation will be 

A + Y = Y -----II

Initially Y = 0

Then we make high logic on A = 1 by any push button

Then resultant Y = 1 for ever as we discussed in previous post of Latching the Load by Boolean Algebra.

Unlatching function by Boolean Algebra:

Now we are going to do it Unlatch by Boolean algebra just by adding one more function in above Boolean expression.

(A + Y) . B' = Y -----III

In above expression III B is complemented variable and connected with push button.

Latched

Unlatched

By Using Latching Unlatching function:

By using built-in function of latching unlatching its very simple to set reset the load by using push buttons.

 

Download Program files here:

Latching by Boolean Algebra

Latching by function

  

PLC Course

 

A. A 

Hi here i am after long time with new thing that is PLC Professional Course. Its very important for all Electrical, Electronics and for Mechanical technicians and Engineers  equivalently. 

In this course we are targeting PLC basic concepts, internal circuits and structures, DLD concepts, Ladder Language, simulation through LogixPro simulator

Here is course outline 

If any want video course so please contact on 

03455913812   

Email : 0101engr@gmail.com 

or comment me

Ladder Logic of Exclusive Gates (XOR, XNOR) for PLC

Hi is new one Post related to PLC Programming in ladder language using LogixPro slides. Two Exclusive gates are little bit different then basic gates because XOR and XNOR simplified boolean expression are 

XOR: 

                    A` . B + A . B` = C 

XNOR:

                    (A + B`) . (A` + B) = C

like simple combinational boolean expression.  

So according to the rule of ladder logic for boolean algebra it very easy to convert into Ladder logic.

see the thumb rule here

XOR Gate Ladder Logic:

XNOR Gate Ladder Logic:

if you like our work so like share and Comment please 

PLC Programming (Ladder Logic) for Logic Gates

Look the Logic Gates are the base of advance digital like Controllers (Microcontrollers, PLCs) and Processors.

Basically digital field consist on two types one is just combination logic and second one is sequential Logic. In sequential logic some are Programmable devices like Microcontrollers, PLCs, FPGAs, and MicroProcessor etc. So there are different Programming languages w.r.t devices like C, C++, C#, C sharp, ladder language for PLC. Here I am showing Ladder logic by using LogixPro Simulator for Logic Gates. You can download LogixPro Here

NOT Gate Ladder Logic:

very simple by using NC switch with output.

OR Gate Ladder Logic:

By using two NO switches parallel for output as shown above.

AND Gate Ladder Logic:

Two NO switches used in series for output as shown

 

NOR Gate Ladder Logic:

As the simplified boolean expression of NOR. We use two NC switches in series for output.

NAND Gate Ladder Logic:

Same here we use simplified boolean expression of NAND gate for Ladder logic means two NC switches in parallel for output.

for this ladder logic I have share thumb rules for ladder logic.

PLC Programming Thumb Rules

Here I am sharing thumb rules of PLC programming for Boolean algebra. As I discus earlier post that Ladder language is mostly use for PLC and Ladder is totally based on digital means Boolean algebra. In Boolean algebra basically there are four things are very important 

1. Non Complemented variables
2. Complemented variables
3. Plus (+) operator
4. Dot (.) operator

Here I am telling that when you are drawing ladder then how to convert these logics. Mostly Boolean algebra consist on above four things.

1. Non Complemented Variables

When you fined Non Complemented Variables like A or B then mind it, you will use NO (Normally Open) switch in ladder logic. As you see under symbol.

2. Complemented Variable

And when you fined Complemented Variables like A` or B` then mind it, you will use NC (Normally Close) switch in ladder logic. As you see under symbol.

3. Plus (+) Operator (for OR logic)

And when you fined Plus (+) operator between two variables like A + B then mind it, you will use parallel switches according to variable conditions. As example

4. Dot (.) Operator (for AND logic)

And when you fined Dot (.) operator between two variables like A . B then mind it, you will use switches in series path according to variable conditions. As example

Programming Symbols of Ladder language for PLC

Hi here today i am sharing the symbols of Ladder language for PLC Programming. Some symbols are generic but some are specific for relevant Modal of PLC series, these symbols are for LogixPro for Allen Bradly. See the detail description of symbols below

N.O (Normally Open)

Use for NO input switch condition. Logic condition of this symbol is to examine that either input is high are not, if input is high then this will activate internally.  

N.C (Normally Close)

Use for NC input switch condition. Logic condition of this symbol is to examine that either input is Low are not, if input is Low then this will activate internally. It means NC have inverted behavior of NO.  

OUTPUT
This symbol is use for output (to ON or OFF the load) internally have SPST relay.

New Rung:
This symbol is use to add new rung in ladder.

Rung Branch:
This symbol is use to add parallel path (as sub branch) across any switch are branch in a one rung.

Latch:
Latch is output symbol to set or activate (set at ON) the load.

Unlatch:
Unlatch is use to reset or deactivate (to set at off) the load which is latched by latch (symbol) function.

more description and examples with be in next posts.

PLC Simulator LogixPro Free Download

LogixPro is very easy simulator for PLC Practicals for students and professional also. LogixPro is the Simulator designed y Allen Bradly PLC vendor for PLCs Programming in ladder language and also for programming.

LogixPro have some free simulators for training like

1. IO simulator (Simple Inputs and Output panel) 
   
2. Door Simulator (like shutter door open and close)
   
3. Silo Simulator (like refilling plant)
   
4. Traffic Simulator (One way road crossing )
   
5. Batch Simulator (like Mixer boiler Simulator)
   
6. Dual Compressor Simulator
   
7. Bottle line Simulator (Advance refilling plant)
   
8. Elevator Simulator (for 4 floors) 
   

and having simple functions 

1. Simple IOs functions (NC NO etc)
2. Logic functions
3. Arithmetic functions 
4. Timers
5. Counters 

for students version

Download Here:

link 1

link 2