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Rs-485 help — Parallax Forums

Rs-485 help

AJIAJI Posts: 22
edited 2005-01-10 02:45 in Robotics
I need help

I am using a BOE and a maxRS485 transciever to send serout to a PSC.

I read the data sheet like 30 times. I·read Stamp Aplications·No 28·(June '97)

It has a sample string in·it·that needs to be sent "000001", then goes on to say

"Since the lowest·two bits are reserved for the RS-485 tranciever the statring pattern is "00000100"

I don't find any such thing in the data sheets.

Right now my little network is not·working.

do I need to add·2 more bits to the string? what is meant by the above " "·

I have one rs485 set to rx and one to tx. confirmed by voltmeter.

Only on the ouput of the tx is·steady +5v on pin B and 0v in pin A. If I pull off the DI wire and connet it directly to the PSC it works fine.
just not working connected to the RS-485.


I will be ordering the book Serial Port Complete next week till then any help would be apeciated.



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