Treatment FAQ

how to program in plc by seeing water treatment process

by Rey Connelly Published 2 years ago Updated 2 years ago

How to introduce the use of plc in sewage treatment project?

May 11, 2010 · Sequence PLC Programming for Process Automation For Water Treatment : Step 1 :-a. If Switch = ON Then Valve No.01 = ON And Pump No.04 = ON And Valve No.06 = ON. b. If FULL WATER No.09 = ON Then Valve No.01 = OFF And Pump No.04 = OFF And Check Clean Water Sensor No.08. c. If OK (Clean Water Sensor) No.08 = ON Then Finish Process. d.

What is PLC program for water filling and discharging process?

May 11, 2010 · Please Download Picture Programming Ladder PLC :-PLC Omron Programming for Process Automation For Water Treatment Reading Ladder PLC Programming for Process Automation For Water Treatment : Step 1 : Process 1 a.If 0000 = ON Then 1000 = Momentary ON ( Diff. Up). b.If 0000 = ON And 1000 = ON And 1002 = OFF And 1003 = OFF Then 1001 = ON ( …

What is PLC program for water level control?

When the water level reaches low level then pump will be stopped. if the level of the water reaches high point, the pump will started so that the water can be drained and thus lowering the level. Indication Panel : This panel contains LED’s to show the status of the water level control. It has Pump Running, Low Level & High Level Signals.

What are the applications of PLC programming?

Feb 13, 2011 · Process Automation For Water Treatment Detail Process Automation For Water Treatment : Information on Drawing Numbers for Detail Process Automation : 1.Valve to the Source of Dirty Water 2. Valve to Get Water From Water Tank 2 3. Valve to Get Water From Water Tank 1 4. Water Pump 5. Water Purifier or Water Purification or other 6.

WHAT IS PLC in water treatment?

Abstract -- The proposed automation solution for waste water treatment plant involves the use of a series of small control systems that run the facility, PLC (Programmable Logic Controller) continuously monitor the operation of pumps, closures and other devices, collect and execute commands coming from the higher ...

What are the steps in the water treatment process?

These include: (1) Collection ; (2) Screening and Straining ; (3) Chemical Addition ; (4) Coagulation and Flocculation ; (5) Sedimentation and Clarification ; (6) Filtration ; (7) Disinfection ; (8) Storage ; (9) and finally Distribution. Let's examine these steps in more detail.

How do you program a PLC?

Step-By-Step Procedure for Programming PLC Using Ladder Logic
  1. Step 1: Analyze and Get the Idea of Control Application. ...
  2. Step 2: List All the Conditions and Get the Design using Flowchart. ...
  3. Step3: Open and Configure the PLC Programming Software. ...
  4. Step 4: Add the Required Rungs and Address Them.
Jul 30, 2019

What are the 4 steps of water treatment?

4 Steps of Community Water Treatment
  • Coagulation and Flocculation. ...
  • Sedimentation. ...
  • Filtration. ...
  • Disinfection.

What are the 7 methods of water treatment?

Top 7 Methods of Water Treatment
  • Coagulation / Flocculation. Coagulation is adding liquid aluminum sulfate or alum and/or polymer to raw or untreated water. ...
  • Sedimentation. When water and flocs undergo the treatment process, they go into sedimentation basins. ...
  • Filtration. ...
  • Disinfection. ...
  • Sludge Drying. ...
  • Fluoridation. ...
  • pH Correction.
Nov 7, 2015

What are the 5 stages of water treatment?

The 5 major unit processes include chemical coagulation, flocculation, sedimentation, filtration, and disinfection (described below). There are chemicals added to the water as it enters the various treatment processes.

What is the easiest PLC to program?

Both in my own personal experience with many brands of PLCs and delivering PLC training to those from many walks of life, my experience has shown Rockwell ™ and Directsoft ™ are the easiest PLCs to learn on.

What is PLC programming software?

PLC software allows machines to perform tasks repeatedly to save time, boost efficiency and diminish errors. A programmable logic controller (PLC) is an industrial appliance specifically designed and installed to administer manufacturing processes.

Which software used for PLC programming?

Top PLC programming software
  • Simatic step7.
  • Tia portal.
  • Machine expert basic.
  • Twido suite.
  • Ladder editor.
  • HX CODESYS.
  • Pro-H.
  • RSLogix 5000.
Oct 1, 2021

What are 3 different methods of water treatment?

Water treatment steps
  • Coagulation. Coagulation is often the first step in water treatment. ...
  • Flocculation. Flocculation follows the coagulation step. ...
  • Sedimentation. Sedimentation is one of the steps water treatment plants use to separate out solids from the water. ...
  • Filtration. ...
  • Disinfection.

What is screening and straining in water treatment?

Screens or sieves are great for straining larger particles out of water and are a simple, but flexible technology for diverse configurations. These work well applied at (inlet of) central treatment facilities, but simple use makes it suitable for decentralized or rural applications.Nov 17, 2016

What are the steps in water treatment used by community water systems?

  • 1.) Screening. Surface water (water from Angat Dam and Ipo Dam) often contains large debris, such as sticks, logs, leaves, fish, and trash. ...
  • 2.) Pre-Chlorination (Disinfection) ...
  • 3.) Rapid Mixing. ...
  • 4.) Flocculation. ...
  • 5.) Coagulation. ...
  • 6.) Sedimentation. ...
  • 7.) Filtration. ...
  • 8.) Disinfection.

Why is water treatment important?

Water treatment process controls need to first be reliable and cost effective to increase access to clean drinking water across the nation. The U.S. may be a first world country, but that doesn't mean that all its citizens have the water quality they need to thrive.

What is ControlByWeb?

ControlByWeb helps address the need for affordable, reliable monitoring and control that brings data to the forefront. Water treatment facilities use our programmable I/O controllers and level sensors to monitor and control each treatment process from chemical-dosing to filtration. Our I/O modules help make water plant automation much more attainable for budget-restricted organizations and municipalities. Learn more about the rural water crisis.

What is the Rural Water Crisis?

The Rural Water Crisis. Many municipalities suffer from budgetary restraints that threaten their ability to prevent and respond to a crisis. In fact, the Natural Resources Defense Council (NRDC) reported that in 2015, there were "80,000 reported violations of the Safe Drinking Water Act by community water systems.".

What is the X-600M used for?

The X-600M's dashboard is used as the SCADA software. Plant operators monitor graphs and other visual metrics for each process, and can determine action items based on the charted results. More expensive systems have an illustrated schematic of the water treatment system. However, Evans says, "We know what it looks like. The most important part is the graphing function. That's what we like to see." For Evans and the city of Denison, the savings are worth not having illustrated schematics.

What is an example of a PLC in sewage treatment?

Take a large enterprise sewage project as an example to introduce the use of PLC in sewage treatment project. The project covers an area of about 350 m 2. Sewage treatment capacity is 950 m 3 /d. It adopts biofilm process. The concentration of COD, BOD in sewage was 320 mg/L, 240 mg/L. In order to realize the automatic operation of the sewage project, the electrical control system adopts PLC as the core [ 9] .

What is PLC system?

The PLC system is applied to the sewage treatment plant, so it means that modern high and new technology has been adopted in the process, equipment and management, which has greatly promoted the scientific progress of the industry and created the obvious social and economic benefits. 2. The Principle Analysis of PLC.

Why is PLC important?

Now PLC plays a very important role in the actual industrial control [ 2] . Typically, the PLC technology is applied to modern sewage treatment. If we use PLC technology reasonably, there will be plenty of advantages. Comparison the traditional sewage treatment plant by adopting manual control, PLC system greatly improves the degree of automation of wastewater treatment [ 3] . The operator’s workload is greatly reduced. The labor intensity is greatly reduced. The data processing and charting of computer makes sewage treatment achieve scientific and modern in management. The adoption of a PLC system allows the rational use of energy and equipment to save energy, reduce energy consumption and achieve significant economic benefits. The PLC system is applied to the sewage treatment plant, so it means that modern high and new technology has been adopted in the process, equipment and management, which has greatly promoted the scientific progress of the industry and created the obvious social and economic benefits.

How many sewage plants did China have in 2000?

China also gave more corresponding funding and technical support to sewage treatment. According to statistics, by the end of 2000, China has built 427 municipal sewage treatment plants which included 282 secondary treatment plants. The treatment rate of secondary treatment plants is only about 15%.

What is the purpose of oxidation ditch?

In the oxidation ditch system, carrying out the biochemical treatment is to decompose the harmful substances in the sewage. This process uses a number of chemicals to enhance the treatment effect, such as compound alkali, chlorine, oil flocculants, in order to remove the oil, disinfection, adjust pH value.

When did Chinese sewage treatment begin?

Chinese sewage treatment began in the 70 s of last century . At that time, it has begun to make use of abandoned rivers, swamp and the surrounding city to build a stable pond for sewage. According to the literature at that time, the quantity of the stable ponds is 38.

Is automatic control system used in China?

The automatic control system introducing advanced foreign technology to waste water treatment plant in recent years in china has been widely used in distributed control system. It also applies detecting instruments of a high degree of automation, new technology and new equipment, achieving good results. At present china has built dozens of sewage treatment plant. According to their operation situation, the control system which includes the central computer and PLC has a good adaptability, as the dominant form of domestic sewage treatment automation system application. But there are still the following problems:

Problem Solution

  1. To solve this problem, we will use S7-1200 PLCfor programming.
  2. Here we use two sensors for level measurement, one is for High level and second is for low level.
  3. We use feeding valve (MV1) for filling Cycle of the tank and discharge valve  (MV2) for discharging cycle of the tank. Both will be controlled according to sensor logic. So when the …
  1. To solve this problem, we will use S7-1200 PLCfor programming.
  2. Here we use two sensors for level measurement, one is for High level and second is for low level.
  3. We use feeding valve (MV1) for filling Cycle of the tank and discharge valve  (MV2) for discharging cycle of the tank. Both will be controlled according to sensor logic. So when the water level goe...
  4. When high level is detected then buzzer will turn ON for alarm purpose. Cycle will stop if user will press stop button from the control panel.

List of Inputs/Outputs

  • Digital Inputs
    1. Start PB : I0.0 2. Stop PB : I0.1 3. TLB 1 : I0.3 4. TLB 2 : I0.2
  • Digital Outputs
    1. Cycle ON : Q0.0 2. Valve MV1 (Feed) : Q0.1 3. Valve MV2 (Discharge) : Q0.2 4. Agitator/Mixer M : Q0.3 5. Buzzer : Q0.4
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Program Description

  1. For this application, we used S7-1200 PLC and TIA portal software for programming.
  2. In Network 1 we used latching circuit for cycle ON (Q0.0) output. It can be started by pressing START PB (I0.0) and stop by pressing STOP PB (I0.1).
  3. When cycle will be started then system will check level of the tank. If tank level is low then then feeding process will start and tank level is high then Discharge cycle will start.
  1. For this application, we used S7-1200 PLC and TIA portal software for programming.
  2. In Network 1 we used latching circuit for cycle ON (Q0.0) output. It can be started by pressing START PB (I0.0) and stop by pressing STOP PB (I0.1).
  3. When cycle will be started then system will check level of the tank. If tank level is low then then feeding process will start and tank level is high then Discharge cycle will start.
  4. Here we have taken NO contact for both sensorsin the program for simplicity. It can be done by relay logic in field or you can use such type of sensors.

Runtime Test Cases

  • Note : The above PLC Logicprovided for basic idea about application of PLC in Water filling and Discharging Process. The Logic is limited and not complete application. Author : Bhavesh If you liked this article, then please subscribe to our YouTube Channelfor PLC and SCADA video tutorials. You can also follow us on Facebook and Twitterto receive daily updates. Read Next: Li…
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