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From: bryanf@fluke.UUCP (Bryan Faubion)
Newsgroups: net.dcom,net.lan
Subject: RS485 communication standards?
Message-ID: <1463@vax1.fluke.UUCP>
Date: Tue, 22-Apr-86 13:06:39 EST
Article-I.D.: vax1.1463
Posted: Tue Apr 22 13:06:39 1986
Date-Received: Sat, 26-Apr-86 06:34:44 EST
Distribution: net
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Lines: 26
Xref: watmath net.dcom:1836 net.lan:1441

[]
I'm looking for information on RS485 networks that connect industrial
input-output devices. RS485 is an electrical standard for a multidrop,
balanced, twisted pair, transmission medium (like RS422). Is anyone
aware of a standard network protocol, defacto or otherwise, for using
this medium?  I'm not looking for a big, complex packet switching
protocol, rather what I need is a fairly simple protocol that would not
place a heavy real time processing burden on a microprocessor. All of
the devices on the net do not need to communicate with each other, only
to a single bus master.

Any leads would be appreciated: names of companies using RS485, pointers to
standards, part numbers of microprocessor peripherals, etc.

Thanks,

                                *******
Bryan Faubion; John Fluke Mfg. Co MS 243F; PO Box C9090 Everett WA 98206
{uw-beaver,decvax!microsof,ucbvax!lbl-csam,allegra,ssc-vax}!fluke!bryanf
                             (206) 356-6213
-- 

                                *******
Bryan Faubion; John Fluke Mfg. Co MS 243F; PO Box C9090 Everett WA 98206
{uw-beaver,decvax!microsof,ucbvax!lbl-csam,allegra,ssc-vax}!fluke!bryanf
                             (206) 356-6213