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RS 485 or 422 communication — Parallax Forums

RS 485 or 422 communication

Jesse HastyJesse Hasty Posts: 29
edited 2008-10-16 17:45 in BASIC Stamp
Is there hardware and software to implement an RS 422 or RS 485 serial link on a BS2?· I'm sure there is and I just can't find it on the website.· Thanks to anyone pointing me in the right direction.·

Comments

  • stamptrolstamptrol Posts: 1,731
    edited 2008-10-16 17:45
    ·Hi,

    ·· I use 75176 chips to convert 5 volt serial logic to rs-485.

    ·· Attached is a sketch of a stamp BS2sx talking/listening ·rs-485 to a Toshiba PLC. The use of the BS2sx was required to run reliably at the 9600,8,N,1 that the Toshiba used. I've done similar links with a BS2, but at lower speed.

    · The program shows how the stamp asks the Toshiba for data and how the returned hex values are converted for display.

    · Cheers,



    ··

    ···


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    Tom Sisk

    http://www.siskconsult.com


    Post Edited (stamptrol) : 10/16/2008 5:51:43 PM GMT
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