All You Need to Know About Modbus RTU

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A Quick Overview of the serial communication protocol Modbus RTU by John S. Rinaldi of Real Time Automation.
Learn about Modbus RTU, visit our handy overview at www.rtautomation.com/technolo...
Ready to take your automation protocol knowledge to the next level? Subscribe to our Automation Education email series to learn the ins and outs of the top industrial protocols in a byte-size weekly format! www.rtautomation.com/yt-subsc...
Want more Modbus? Check out John S. Rinaldi's book, The Everyman's Guide to Modbus, now available on Amazon! www.amazon.com/Modbus-Everyma...
Get the first 3 chapters for free here: www.rtautomation.com/modbus-b...
To learn more about Real Time Automation, check us out on www.rtautomation.com/
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Опубликовано:

3 фев 2010

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Комментарии : 148

@finhunter 13 лет назад

Lake Baikal is the world's largest freshwater lake in terms of volume. It contains about 5521 cubic miles of water, or approximately 20% of Earth's fresh surface water, all five of the North American Great Lakes combined. The largest lake in the United States is Lake Superior, one of the Great Lakes, located on the United States / Canada border. It is largest in both surface area 31,700 square miles and in volume of water 2904 cubic miles (12,100 cubic kilometers).

@konastinkykid

Video was ruined for me because he thinks Lake Michigan is bigger than Superior.

@internetmovieguy 9 лет назад

Does anyone else hear the beeping?

@henapra 2 года назад

I cannot believe a video made 11 years ago has one of the best explanations! Thanks John! - From a humble modbus beginner!

@antonemilit2178 3 года назад

Im super serial about understanding Modbus

@isnainiahmadi1411 3 года назад

I love hearing an explanation from an expert technician. Simple yet comprehensive.

@DodgyBrothersEngineering 5 лет назад

Wow someone who can actually articulate something of interest without beating about the bush. Well done John.

@kevin00861 Год назад

Thanks a lot dear Engineer

@aleemkhunkhunakhan4578 2 года назад

muscat motorola plc 300. In this has come programming communication issue . Can any guy help on this. We searching a vendor in site KSA tosolve this issue

@juanbahamonde6777 3 года назад

I'm watching this on 2021 in Chile, thx for the video

@beardedsawyer6322 5 лет назад

As an engineer, I think people like this man are desperately needed in the engineering education institutions. He explained it in less than 15 minutes, while universities spend an entire week (if not months) on such a simple matter. Well done, John.

@dushyantbangal169 8 лет назад

Modbus RTU by Mike from Breaking Bad :D

@RufusVidS Год назад

Even though I know all this stuff, I find this an awesome presentation! Concise, correct, and accessible! Kudos!

@renzorisotto7205 9 лет назад

Thank you too..., good speech, a good use of the "Keys", all is clear and presented in a understandable English, especially for those who do not speak as as native speakers !!.

@TimMattison 6 лет назад

A very accessible intro to/refresher on Modbus. Thanks John!

@hiteshvijayvargiya4592 5 лет назад

Thnaks John for the video , it helps me understand the Modbus. Easy to understand .

@ChrizRockster 9 лет назад

This is a great video John. I think it would also help to mention if I may, that RS485 Modbus is a 3-Wire network. A lot of people think Half-Duplex and 2-wires. But its critical to note that you have a Positive, Negative and Reference cable. Its advisable to use 2-twisted-pair cable i.e. Belden 9842 (twisted pair is better at noise cancelling than outer shields anyway). As a last resort you can use 1-twisted pair cable with the drain wire acting as the 3rd REF core. Its important to note that the 3rd core is NOT a ground connection but a direct reference for the Positive and Negative wires on the network. Keeping a nice clean network saves a lot of hassle and head-scratching as without a bench scope to hand, some issues are hard to pinpoint.