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Information/books/mabuals about PLC/HMI communication.

 
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ivan bratanov
Junior
Junior


Joined: 23 Aug 2019
Posts: 15
PostPosted: 28/08/2019 09:18    Post subject: Information/books/mabuals about PLC/HMI communication. Reply with quote
Hello, dear users, I'm looking for technical information or even tetxbooks or manuals about how to establish different types of communication protocols between industrial devices - HMI and PLC. I'm writing ladder programs for PLC and programs for HMI, but how to make them talk together is unclear for me, unfortunatelly!
I need to know as much as possible about how to use RS-232, RS-422 and RS-485 in HMI/PLC, station addresses, master/slave, data length, parity, stop bits and everything the rest I'll need to establish successful connection between two devices.
I was thinking all the time that writing ladder programs for a PLC or software for HMI will be the most difficult part of the job, but now it seems that I was wrong!
So I'll be extreme thankful to anyone who sends me a link to specialized info or textbooks/manuals which are explaining this matter in details.

Thank you!
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PAKOR
Junior
Junior


Joined: 19 Jun 2019
Posts: 3
PostPosted: 29/08/2019 22:22    Post subject: Reply with quote
Every plc developer has different approaches
here you/ll find some excerpts on rs 232..
http://plc.myforum.ro/rs232-and-rs485-excerpts-vt11359.html

a general approach cannot be done as long as every manufacturer has different approaches..
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