MODBUS RTU Controller

Implement the MODBUS RTU industrial automation protocol. This project connects your FPGA to the world of PLCs, sensors, actuators, and industrial control systems used in factories worldwide.

scheduleTime

10-12 hours including protocol testing

bar_chartDifficulty

Advanced

codeCode

~450 lines

schoolWhat You'll Learn

check_circleIndustrial communication protocols
check_circleCRC16 checksum calculation in hardware
check_circleMODBUS function codes and data formats
check_circleMaster-slave communication patterns
check_circleReal-time response requirements
check_circleIndustrial timing and noise immunity

constructionWhat You'll Build

build_circleMODBUS RTU master and slave implementations
build_circleRead/write coils and holding registers
build_circleCRC16 generator and checker in hardware
build_circleProtocol analyzer for debugging MODBUS traffic
build_circleA simple industrial I/O controller

settingsTechnical Details

Modules

modbus_rtu.vcrc16.vmodbus_master.vmodbus_slave.v

Key Concepts

Protocol state machinesCRC algorithmsFrame parsingRegister mappingTimeout handling

Synthesis

Handles 9600-115200 baud, sub-millisecond response time

publicReal World Application

MODBUS is the backbone of industrial automation. From factory floors to oil refineries, from building automation to smart grids - MODBUS connects millions of devices. This skill opens industrial embedded systems careers.

checklistPrerequisites

arrow_rightUART mastery
arrow_rightCRC understanding
arrow_rightProtocol state machines
arrow_rightIndustrial networking basics

arrow_forwardNext Steps

MODBUS integration prepares you for Week 10's multi-device orchestration and positions you for industrial FPGA roles.