Skip to main content

PLC based Drink Dispenser System

Develop ladder logic program for PLC-based Drink Dispenser System according to the logic given below,

  1. Press the power button to activate the power supply as shown in the figure.
  2. Put manually glass (or a cup) on conveyor to hold up drink A/B/C as shown in the below figure.
  3. Press a one-button from A/B/C whatever you choose on the available types of drinks (It is toggle type switch).
  4. Press the start button from the local panel.
  5. The glass (or a cup) moves from limit switch 2 to 4 and stops the conveyor when glass reaches the appropriate limit switch, which we select from the A/B/C toggle switch.
  6. Glass (or a cup)  fill by drink A/B/C for 15 sec.(as per glass size) and conveyor again start-up to glass not reach limit switch -5.

PLC Dispenser System 


INPUTS:

I:0.0 – POWER ON PB

I:0.1 – POWER OFF PB

I:0.2 – START PB

I:0.3 – STOP PB

I:0.4 – LIMIT SWITCH, L1

I:0.5 – LIMIT SWITCH, L2

I:0.6 – LIMIT SWITCH, L3

I:0.7 – LIMIT SWITCH, L4

I: 0.8 – LIMIT SWITCH, L5

I:0.9 – SWITCH A

I:0.10 – SWITCH B

I:0.11 – SWITCH C

OUT PUTS:

0:0.0 – POWER

0:0.1 – CONVEYOR

0:0.2 – SOV FOR DRINK A

03- SOV FOR DRINK B

0:0.4 – SOV FOR DRINK C

Dispenser PLC Program



Program Description:

Rung 1:

I: 0.0 and I: 0.1 respectively start and stop press button to control the power supply with latch output.


Rung 2:

Put the glass on L1 (I:0.4) place, which is converted from NO to NC, Press the Drink selection button from A/B/C, respectively enable I:0.9/I:0.10/I:0.11.


Press the Start PB to enable NC (I:0.2) to start the conveyor (O:0.1) until any solenoid valve (O:0.2/O:0.3/O:0.4) not energized and Stop PB(I:0.3) not enable.


After completion of the filling process, conveyor again starts until not reach up to L5 place (I:0.8).


Rung 3:

Conveyor drives the glass up to L2 place as per selected drink type from A. enable the solenoid A (O:0.2) until timer (T:1.DN) bit not enable.


Rung 4:

Fill the drink A for 15 sec (assume constant as per glass size) start the Timer enable the SOV A up to 15 sec and respective timer down bit control the SOV ON/OFF (solenoid A (O:0.2)) state.


Rung 5:

Conveyor drives the glass up to L3 place as per selected drink type from B. enable the solenoid B (O:0.3) until timer (T:2.DN) bit not enable.


Rung 6:

Fill the drink B for 15 sec (assume constant as per glass size) start the Timer enable the SOV B up to 15 sec and respective timer down bit control the SOV ON/OFF (solenoid B (O:0.3)) state.


Rung 7:

Conveyor drives the glass up to L4 place as per selected drink type from C. enable the solenoid C (O:0.4) until timer (T:3.DN) bit not enable.

Rung 8:

Fill the drink C for 15 sec (assume constant as per glass size) start the Timer enable the SOV C up to 15 sec and respective timer down bit control the SOV ON/OFF (solenoid C (O:0.4)) state.

-END-

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Ferrules and Cross Ferruling

 Ferrules are identification labels provided for every wire terminations in an instrument, equipment, or electrical/instrumentation control panels. These tube-shaped sleeves can be inserted easily on each individual wire in a multi-core cable. In earlier days fixed digits/letters are used as ferrules, but now Instrumentation engineers/technicians prints out desired ferrules by using a ferrule printing machine. Typical Ferrule The numbers/ letters on the ferrules will be given as per the approved electrical hook up or loop diagrams. This helps technicians to easily identify a particular loop/wiring from a series of terminal blocks and to troubleshoot the desired terminal connection. Separate numbers on the ferrules distinguish the positive and negative polarities of wires, thus ensure the polarity protection of the instrument. Cross Ferruling  As a wire is connected on its both ends, it is quite useful to use a cross reference method for wire identification. Unlike normal ferru...
1 comment
Read more

PLC Program for Mixing Tank

 Create a ladder diagram for controlling a batch mixing process. Implement a PLC program for mixing tank or Mixing Process using PLC Ladder Logic. PLC Program for Mixing Tank Fig : Mixing tank A tank is used to mix two liquids. The required control circuit operates as follows: A. When the START button is pressed, solenoids A and B energize. This permits the two liquids to begin filling the tank. B. When the tank is filled, the float switch trips. This de-energizes solenoids A and B and starts the motor used to mix the liquids together. C. The motor is permitted to run for 1 minute. After 1 minute has elapsed, the motor turns off and solenoid C energizes to drain the tank. D. When the tank is empty, the float switch de- energizes solenoid C. E. A STOP button can be used to stop the process at any point. F. If the motor becomes overloaded, the action of the entire circuit will stop. G. Once the circuit has been energized, it will continue to operate until it is manually stopped. Solution...
2 comments
Read more

What is a Torbar? – Averaging Pitot Tubes

 The Torbar is employed for flow measurement of liquids, gases, or steam in circular, square, or rectangular section ducts for large flow rates. The Torbar is an insertion type multi-port self-averaging primary sensor for flow measurement. Torbar TORBAR is a set of Pitot tubes mounted on a bar across the pipeline with no moving parts. An averaging Pitot tube is a technology, while TORBAR is a manufacturing brand name. There are several brands available in the market with VERABAR, ANNUBAR, etc. Averaging Pitot Tube Principle Purpose Averaging Pitot tube can be employed when the average velocity of the flow profile, rather than the velocity in a specific point in the cross-section is desired. Averaging Pitot Tubes Principle It measures the differential pressure between the static pressure tap and the tap of full pressure of a stream. Thus such magnitude of differential pressure is directly proportional to the square of the flow rate. Working The TORBAR is designed in such a way that ...
7 comments
Read more