Standard Communication Protocol RS485, A Comprehensive
Long-Distance Communication: RS485 supports data transmission over distances up to 4,000 feet (1,200 meters), far exceeding the range of RS232. High Speed: RS485 supports data
Two devices can communicate with each other over a long distance (up to 1200m) using RS485 communication. Unlike RS232, RS485 has a 10 mbit/s data transfer rate. Lastly, it is master-slave communication so that each slave can communicate with the master. For each master, you can assign up to 32 slaves. Why we need RS485 based Communication?
Set up the RS-485 communication parameters: Configure the baud rate, parity, data bits, and stop bits to match the settings of both the master and slave devices. All commands sent must end with a “Carriage Return” “Line Feed” pair. Assign RS-485 addresses: Assign a unique address to each slave device on the network.
This reference design establishes a simulation model for implementing RS-485 communication over power cabling. Use this simulation model to assess the feasibility of implementing RS-485 communication at a given data rate, cable length, and loading for a specific cable before taking the time-consuming step of building a representative network.
It uses a balanced pair of wires to send signals and can communicate at high speeds over distances up to 1200 meters. The purpose of RS-485 is to provide a reliable and robust communication protocol for industrial and commercial environments where noise and interference may be present.
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