I am doing simulation at proteus and i didn't connect pullups to the A and B lines.I have connected pullup only to the RX pins. Is =FEt necessary at simulation? 2009/6/24 Dario Greggio > Yusuf =D6zkay ha scritto: > > You are right, the problem is about frame error. But what is the reason > of > > it, i couldn't find it yet. > > > > > Well, it can be anything, from glitches at power suppplly, to glithes in > the state of 485 A-B lines when switching from TX to RX - btw, do you > have pull-up and pull-down at A and B? > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist