RS485通讯的工作原理是什么？ - 知乎
RS485通讯接口分为两种，一种是两线制，另一种是四线制。 两线制的是半双工通讯方式，四线制是全双工通讯方式。 RS485通讯接口，抗干扰能力强，抗噪声干扰性好。 在工业控制 …
Compatibilities between RS-485 and RS-422 - Forum for Electronics
May 20, 2003 · half duplex transmission protocol for rs485 Is it possible to use a RS-485 interface with a device which uses RS-422? In other words, is RS-485 fully compatible with RS-422? …
Compatibility between RS232 and RS485 | Forum for Electronics
Sep 23, 2017 · I red that RS485 works with differential voltages and can tolerate lower voltages than RS232. My question is: Is the label RS485 wrong (since it worked as RS232) or the two …
Confusion with RS485 data Tx+, Tx-, Rx+, Rx-, A, B, Y, Z
May 16, 2008 · The RS485 is a bidirectional communication so there is no meaning to use Tx+ or Tx- alone & the best notation is A, B. But unfortunately here i have to use different …
Creating a TCP/IP network over RS-485 bus | Forum for Electronics
Jul 31, 2004 · Re: TCP/IP over RS-485? If you are using RS-485 in point-to-point mode, U can use PPP or SLIP, it is a differential version of asynchronous communication as Buddy talked. …
RS485 Source Code for PIC | Forum for Electronics
Oct 27, 2003 · rs485 pic On this page **broken link removed** you will find all about communication between PIC and other devices or with other PIC with useful picbasic source …
How to interface rs485 with pic16f877a? | Forum for Electronics
Feb 4, 2005 · 0 Reaction score 0 Trophy points 1,281 Activity points 58 rs485 with pic dear all m making a project using pic microcontroller,in which i need rs485 communication link.can …
Implementation 12 RS232/Rs485/RS422 Ports in FPGA
Mar 14, 2013 · Hi friends! Looks so great to see you again... Now I am working with FPGA kits.. I hope FPGAs are almost same as micro controllers except pin configuration flexibility. I want to …
How to communicate with RS485 via Windows? | Forum for …
Jun 27, 2005 · Re: RS485 and PC Hi, If it is appearing as a COM port under Windows, you will be able to communicate through it as a COM port. But you will need a matching RS485 device …
RS485 Termination Resistor | Forum for Electronics
Feb 15, 2002 · rs485 termination Hello, I have a half duplex RS485 communication between 1 slave and master but was wondering what is the effect of the termination resistor? My length of …