How does Industrial Wireless Communication Work?

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Did you know that wireless communication has been used in industrial applications for over 30 years?
Yes, and some of the first applications were with the wireless control of Automated Guided Vehicles and Warehouse Cranes.
Wireless technologies have become progressively widespread in industrial automation applications for solutions with system integrators, government agencies, and industrial companies.
A powerful advantage with wireless networks is that they can be deployed easily to transmit data to areas eliminating the requirement to run expensive cable infrastructures.
And in addition to location flexibility, wireless technologies offer real-time communication for applications such as with SCADA and RTU communication, high bandwidth for video transmission used for remote security, and offers a lower total cost of ownership.
Electromagnetism is the creation of a magnetic field from the movement of electrically charged particles or movement or interaction between electricity and magnetism such as when a changing electric field generates a magnetic field or with the inverse when a changing magnetic field generates an electric field.
This same force is used to transmit radio waves when alternating electric current flows, propagating the signal through internal wires into a transmitting antenna which in turn makes electrons vibrate producing radio waves.
Essentially, the antenna radiates the alternating current as an electromagnetic wave, this is where wireless transmission starts.
Then the radio waves travel through the air at the speed of light and when these waves reach the receiving antenna, they, in turn, make electrons vibrate within it, reproducing the same waveform generated by the transmitting radio.
Various frequencies can be used for different purposes. We call a range of different frequencies a spectrum and are divided into areas of specific usage or bands.
Frequency is about how many electromagnetic waves pass through a point of reference every second.
Wavelength is the distance measured between the two highest peaks in a wave, this distance is referred to as a period.
Within this electromagnetic band of different frequencies, radio waves have the longest wavelengths and the lowest frequencies which allows them to travel the farthest.
Some of the specific frequency bands you may be aware of are:
- ELF or Extremely low-frequency with a frequency of 3-30 Hz and a wavelength of 105-104 km.
- VHF or Very high-frequency with a frequency of 30-300 MHz and a wavelength of 10-1 m.
- UHF or Ultra high-frequency with a frequency of 300 MHz to 3 GHz and a wavelength of 1 m to 10 cm.
An electromagnet signal does not go straight out to a receiver after being transmitted but radiates the signal in multiple directions.
During the journey, waves radiated from multiple paths endure different types of attenuation or weakening and delay. The receiving antenna captures all the waves as a combined signal and when the wave travels more than one route it is called a multipath channel.
This multipath generated combined signal, now distorted and mixed must be decoded by the receiver to read the data generated.
So, to make the receiver’s job easier we add some additional steps before transmission. Before sending any data, the transmitting components perform the encoding.
The encoding operation appends additional bits into the message which makes the data recovery at the receiver much simpler.
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[@gassanali8667]

All RealPars videos rock! Can't wait to see some real programming in action. Building logical steps and creating algorithms to perform useful tasks is what counts most. It's the essence of programming. Learning the different technologies will follow naturally. Hope to see a small program that controls some devices to perform an action. Stay Safe, RealPars team!

[@realpars]

Hi Gassan, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!

[@MohammedHussain-cc5hl]

Thank you for giving this video RealPars

[@realpars]

You are very welcome, Mohammed!

[@nafeesmd7]

Thanks for explanation. I am looking for videos that detailed differences between form 1, form 2 , form 3 .... Form 4 a,b control panels.

[@Lokeshgowda2023]

🎉🎉🎉super exeleant ❤❤❤

[@mariopascual4460]

Thanks for educational videos...

[@realpars]

So nice of you

[@aungkhinmaw2446]

Waiting part 2 Thanks RealPars

[@Hamza_Algmaty_1996]

Thank you I like this channel Hope you keep posting useful videos on process automation concepts

[@realpars]

Great to hear that, Hamza! Thanks for your positive feedback!

[@transferr33]

Nice topic, cant wait part2,3,4...

[@realpars]

Thank you!

[@matemrima5594]

Very helpful video Please, any videos about MANET, VANET and the relationship with visible light communication system

[@realpars]

Hey! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@hossamaltayeb6980]

great can you please make a detailed video about OPC server and how SCADA uses it to communicate to PLC

[@realpars]

Hi Hossam, Thanks for sharing your suggestion with us! I have sent this over to our course developers. Happy learning!

[@ClintBritt]

Great channel. ! I would like to run our sports scoreboard wirelessly, for a baseball field. The cable output from the data entry box is a simple TRS cable (like you plug into a guitar), and the same cable plugs into the scoreboard. Can you recommend hardware to buy? (Transmit and receive). Thanks!

[@realpars]

Enter "trs cable wireless" into your favorite browser. There are many different devices that may work. I have never done this before, so you may have to experiment. A call to your scoreboard manufacturer would likely7 be a good place to start for guidance.

[@greenhouse5811]

Great) Can you make detailed video about DO-board on PLC, how does it connect with relays, as they have low current and can't trigger any relays

[@realpars]

Hey! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@bakersawwan4762]

How long is the maximum distance the signal can travel between the transmitter and receiver?

[@realpars]

That depends on several factors. Outdoors, with a clear line-of-sight, a range of 300m is not uncommon. In a building, or wherever there are physical obstructions, the ranges are typically 30 - 100m. These ranges can be extended by using repeaters, mesh networking, and other approaches. Some researchers are looking at what are called Long Distance Wireless Sensor Networks (LDWSN), which may allow transmission distances of up to 12km. Of course, this is not yet commercially available and will be very expensive. Also, limitations in signal strengths allowed in the 900 MHz to 2.4GHz band may make LDWSN impractical for widespread use.

[@suganyabasker4703]

Very useful

[@yepyolochannel]

Thaanks aloot.. cant wait for part 2 tho, when is it comin ..

[@saleemahamed6352]

Please Upload Videos based on Mindconnenect and Mindsphere Configurations.

[@realpars]

Hi Saleem, Thanks for sharing your suggestion with us! I have sent this over to our course developers. Happy learning!

[@saleemahamed6352]

@@realpars Thanks for responding to my comment.. Realpars

[@vsk5391]

Very helpful

[@realpars]

Glad you think so!

[@md.saifulislam7156]

Thanks sir

[@realpars]

Our pleasure!

[@Fruitysfaction]

I think there are several misleading statements in this video, for example that radio waves travel through air from transmitting antenna to receiving antenna. While this is true it paints a wrong picture for people who have a poor understanding of physics since air is not the transmitting medium.

[@zhaoping5742]

I can’t find that realpars app on my phone

[@realpars]

Hi Zhao, We have recently optimized our learning platform which includes some highly requested features. We are happy to bring you these new improvements which will grant an even better learning experience, as a result we had to decide to no longer support the RealPars App. You can use our webpage to continue watching the video courses.  Hope this helps! If you have any other questions or concerns, please do not hesitate to contact us at any time.

[@vatsalthaker2122]

Can u make videos on flowcomputers

[@realpars]

Hi Vatsal! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@farzadfani4688]

Hi realpars . Thanks for your great training video . Please make video about F&G( fire and gas protection system) this system used in oil and gas refinery industries as an protection system like esd system. Thank you.

[@realpars]

Hi Farzad, Thanks for your support and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!