Let’s Design and Program PLC & HMI for Sewage or Drainage Lifting Stations: A 40 years experienced teacher guides you to creation of a professional PLC ... and ST languages (System Automation Book 1)

Are you venturing into the world of PLC and HMI automation having already experienced the Ladder Diagram or Structured Text but are you dissatisfied with the usual examples of automation for drills, traffic lights, elevators and electric gates?Would you like to design and program something more concrete perhaps a real system that includes an industrial PLC controller, a color HMI interface and that is already set up for supervision with SCADA?If the automation of a water lifting station with four submersible pumps piques your curiosity, you have found the book for you! To create this application you will only need any PLC that supports the 61131-3 Ladder or Structured Text language standard and a color (preferably) HMI touch screen interface.If you are an employee, imagine you showing to the boss and colleagues a working demo of a complete monitoring and control system with PLC + HMI, entirely programmed by you, able to perfectly simulate real operations.Enjoy their amazement as they observe on the synoptic screen of the HMI device the collection tank that becomes filling and the four pumps that are automatically started in sequence until the liquid level is brought back to the preset values.Invite them to interact with the application by manually altering the start / stop sequences of the electric pump using HMI commands, setting e.g. in STOP one of the pumps already started in the system to see how it is promptly replaced with one of the reserve pumps. Or manually start a stopped electric pump, forcing it to START, to see how one of those already in operation stops after few seconds.Change the level sets and see how the start / stop sequence of the pumps reacts to maintain the new set values.Connect your favorite SCADA system to the PLC Ethernet port and activate the dialogue via Modbus TCP. Read the tank level and the electrical absorption of the pumps data and remotely force the start / stop of the pumps as you did previously via the HMI. You can do it very easily because the system you are going to implement is already set up to communicate with SCADA supervision systems.If you are an independent worker, imagine you proposing your DEMO system to a customer and, after having obtained the order, transforming it into a real system, simply by wiring the level and electric current sensors to the PLC and the contactors of the power panel. Deactivate the DEMO mode and carry out the "blank tests" of the contactors to check the correctness of the electrical wiring. Close the contactor disconnectors and enjoy seeing your system work immediately without uncertainties and errors.Do continue in the following months to independently develop new automation applications for other types of systems: water and irrigation, summer / winter air conditioning units, solar heating or industrial refrigeration and so on. You can do it easily because the general concepts you have learned are totally reproducible and reusable on all other types of systems and you will then avoid having to reinvent the wheel from time to time.This book will greatly enrich your knowledge and you will be able to use it directly on the PLC you use every day as long as it is compatible with the IEC61131-3 standard by choosing the development language you prefer Ladder Diagram or Structured Text.I just want to wish you good work and, above all, have fun! Read more