Problem Description

Runtime Test Cases
Inputs
Outputs
Physical Elements
B3:0/0 = 1
O:2/0 = 1
Run Conveyor Motors
I:1/0 = 1 (Momentarily)
Accumulator = +1 Increment Counter
C5:0.ACC = 1000 O:2/1 = 1
Energize Solenoid
T4:0/DN = 1
C5:0.ACC = 0(Reset) Reset Counter, De-energize Solenoid

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PLC Program for Cleaning and Rinsing Bottles in Beverage Industries
This is a PLC Program for Cleaning and Rinsing Bottles in Beverage Industries.
Problem Description
Number of bottles are moving on the conveyor belt. Cleaning of Rinsing of these bottles is to be
performed. Implement automation of this process in PLC using Ladder Diagram programming language.
Problem Diagram

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Problem Solution

A huge cylinder carries all the bottles through this process which rotates on a fixed RPM.

Use a switch to sense the bottle from the conveyor belt.

Conveyor belt also has a fixed speed.

Mechanical clip is used to hold the bottle tightly throughout the process. This mechanical switch has two
positions, hold and return.

Motor is used to turn the bottles. Motor is used such that it rotates only at 180o angle turning bottles upside
down.

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
Along with the cylinder, water supply tubes are fixed in the position and solenoid valves are used to sprinkle
water inside the bottles.

Proximity switch is used to detect the upside position of a bottle to perform rinsing and cleaning.

There are total 30 number of bottles cleaned and rinsed simultaneously in a process stream. Let us program
cleaning of a single bottle.
PLC Program
Here is PLC program for Cleaning and Rinsing Bottles in Beverage Industries, along with program
explanation and run time test cases.
List of Inputs and Outputs
I:1/14 = Start
(Input)
I:1/15 = Stop
(Input)
O:2/15 = Master Coil
(Output)
I:1/0
= Proximity bottle sensor (Enter)
(Input)
I:1/1
= Upside down position detector (proximity)
(Input)
I:1/2
= Proximity bottle sensor (Leave)
(Input)
O:2/0
= Clip bottle (Hold)
(Output)
O:2/1
= Motor to turn bottle (Forward)
(Output)
O:2/2
= Water supply (Solenoid coil)
(Output)
O:2/3
= Motor to turn bottle (Reverse)
(Output)
O:2/4
= Clip bottle (Release)
(Output)
T4:0
= Timer to turn bottle
(Timer)
T4:1
= Timer for solenoid coil to sprinkle water
(Timer)
T4:2
= Timer to leave bottle
(Timer)