[{"data":1,"prerenderedAt":163},["ShallowReactive",2],{"blog-\u002Fblog\u002Fmodbus":3,"blog-all-for-related":4,"blog-all-modbus":5},null,[],[6,29,50,61,81,96,113,128,144],{"path":7,"title":8,"date":9,"tags":10,"authors":13,"description":15,"meta":16,"image":28},"\u002Fblog\u002F2026\u002F04\u002Fdiagnosing-modbus-degradation","Diagnosing Modbus Degradation: From CRC Errors to TCP Timeouts","2026-04-29",[11,12],"flowfuse","modbus",[14],"sumit-shinde","Modbus doesn't fail loudly. It drifts. This guide covers how to diagnose serial vs. TCP failures, eliminate dead device overhead, and build the metrics layer that tells you something is wrong before your operators do.",{"keywords":17,"excerpt":18},"Modbus, Modbus RTU, Modbus TCP, RS-485, CRC errors, TCP timeouts, polling, connection exhaustion, industrial networking, SCADA, exception codes, latency, device backoff, response time, time-series monitoring",{"type":19,"value":20},"minimark",[21,25],[22,23,24],"p",{},"Modbus doesn't fail loudly. It drifts, and by the time operators notice, you've already lost the easy fix.",[22,26,27],{},"It shows up as slightly stale values, a poll cycle that's somehow three times slower than configured, operators filing tickets about data that \"seems off.\" Never a hard fault. Never a clear cause.","\u002Fblog\u002F2026\u002F04\u002Fimages\u002Fmodbus-degradation-img.png",{"path":30,"title":31,"date":32,"tags":33,"authors":34,"description":35,"meta":36,"image":49},"\u002Fblog\u002F2026\u002F04\u002Fmodbus-polling-best-practices","Most Modbus Polling Setups Are Wrong: Here's How to Fix Yours","2026-04-03",[11,12],[14],"Most Modbus polling problems aren't hardware failures. They're three configuration mistakes made at commissioning and never revisited. Here's how to fix them.",{"keywords":37,"excerpt":38},"Modbus polling, Modbus configuration, Modbus troubleshooting, Modbus scan rate, Modbus timeout, RS-485 communication, Modbus batching, industrial automation, Node-RED Modbus",{"type":19,"value":39},[40,46],[22,41,42],{},[43,44,45],"strong",{},"Modbus polling looks simple. It is simple. That's the problem.",[22,47,48],{},"You set a scan rate, point it at a device, start reading registers, and data flows. It works. So nobody looks at it again.","\u002Fblog\u002F2026\u002F04\u002Fimages\u002Fmodbus-polling-best-practices.jpg",{"path":51,"title":52,"date":53,"tags":54,"authors":56,"description":57,"meta":58,"image":60},"\u002Fblog\u002F2026\u002F03\u002Fwhy-opcua-is-not-replacing-modbus-yet","Why OPC UA Is Not Replacing Modbus (Yet)","2026-03-30",[11,55,12],"opcua",[14],"OPC UA has every technical advantage. Modbus is still winning. Here's why the replacement hasn't happened and what would actually change that.",{"keywords":59},"opc ua, modbus, industrial automation, protocol comparison, field devices, scada, mes, industrial protocols, gateway architecture, edge computing, node-red, mqtt, industrial security, certificate management, interoperability","\u002Fblog\u002F2026\u002F03\u002Fimages\u002Fopcua-is-not-replacing-modbus-yet.png",{"path":62,"title":63,"date":64,"tags":65,"authors":66,"description":67,"meta":68,"image":80},"\u002Fblog\u002F2026\u002F02\u002Fmodbus-tcp-vs-modbus-rtu","Modbus TCP vs Modbus RTU: Reliability, Latency, and Failure Modes","2026-02-20",[11,12],[14],"A practical engineering guide to choosing between Modbus RTU and Modbus TCP, covering real latency numbers, failure modes that hide in plain sight, and how each protocol behaves when things go wrong.",{"excerpt":69},{"type":19,"value":70},[71],[22,72,73,74,79],{},"Modbus shipped in 1979. It has outlasted every protocol that was meant to replace it, survived the transition from relay logic to microprocessors and modern SCADA systems, and is still running production lines today. That kind of longevity does not happen by accident. It exists because the protocol is simple, deterministic, and unambiguous, at least in its original form, a point I have discussed in more detail in a ",[75,76,78],"a",{"href":77},"\u002Fblog\u002F2026\u002F01\u002Fwhy-modbus-still-exist\u002F","separate article",".","\u002Fblog\u002F2026\u002F02\u002Fimages\u002Fmodbus-rtu-vs-tcp.png",{"path":82,"title":83,"date":84,"tags":85,"authors":86,"description":87,"meta":88,"image":95},"\u002Fblog\u002F2026\u002F01\u002Fwhy-modbus-still-exist","Why Modbus Refuses to Die","2026-01-26",[11,12],[14],"Learn why Modbus, a 47-year-old protocol with zero security, still dominates industrial automation despite billions invested in modern alternatives",{"keywords":89,"excerpt":90},"Modbus, industrial automation, PLC, OPC UA, EtherNet\u002FIP, MQTT, legacy systems, industrial protocols, factory automation, FlowFuse",{"type":19,"value":91},[92],[22,93,94],{},"Modbus is 47 years old and has no built-in security. By every measure, it should have been obsolete a decade ago. OPC UA, EtherNet\u002FIP, MQTT, Profinet: modern protocols with semantic modeling, encryption, and real-time capabilities arrived backed by billions in vendor investment and industry standardization efforts.","\u002Fblog\u002F2026\u002F01\u002Fimages\u002Fwhy-modbus-wont-dia.png",{"path":97,"title":98,"date":99,"tags":100,"authors":103,"description":104,"meta":105,"image":112},"\u002Fblog\u002F2025\u002F10\u002Fplc-to-mqtt-using-flowfuse","How to Connect Any PLC to MQTT in Under an Hour","2025-10-27",[11,12,101,102],"mqtt","plc",[14],"Learn how to extract data from Siemens, Allen-Bradley, Omron, Mitsubishi, OPC UA, and Modbus, transform it, and publish to MQTT using FlowFuse, without expensive gateways or consultants.",{"keywords":106,"excerpt":107},"MQTT, PLC, Siemens, S7, Allen-Bradley, EtherNet\u002FIP, Omron, FINS, Mitsubishi, MC Protocol, Modbus, Modbus-RTU, Modbus-TCP, OPC-UA, FlowFuse, Node-RED, Industrial IoT, IIoT",{"type":19,"value":108},[109],[22,110,111],{},"Getting PLC data into systems where it can be monitored, analyzed, and acted upon is essential for modern manufacturing. MQTT has become the standard for moving this data. It's lightweight, handles unreliable networks well, and excels at real-time streaming. Once your PLC data is published to MQTT, it creates a common pipeline that IT systems understand, flowing easily to cloud platforms, analytics tools, dashboards, and eliminating protocol translation headaches.","\u002Fblog\u002F2025\u002F10\u002Fimages\u002Fplc-to-mqtt.png",{"path":114,"title":115,"date":116,"tags":117,"authors":118,"description":119,"meta":120,"image":127},"\u002Fblog\u002F2025\u002F09\u002Fusing-modbus-with-flowfuse","Modbus RTU (RS485\u002FRS422\u002FRS232) Communications with FlowFuse","2025-09-26",[11,12],[14],"Learn how to connect Modbus RTU devices to Node-RED with FlowFuse. This guide covers Modbus basics, serial setup, register mapping, and reading\u002Fwriting data for industrial automation and IIoT.",{"keywords":121,"excerpt":122},"modbus rtu, modbus 485, modbus rs485, modbus 485 rtu, modbus communications, rs232, rs485, node-red, flowfuse, industrial automation, iiot",{"type":19,"value":123},[124],[22,125,126],{},"Modbus RTU is one of the most widely used communication protocols in industrial automation. It allows you to read sensor data, monitor equipment status, and control devices through a simple master-slave architecture. This guide will walk you through everything you need to know to start reading and writing industrial data with FlowFuse (a platform built around Node-RED with enterprise-level capabilities).","\u002Fblog\u002F2025\u002F09\u002Fimages\u002Fmodbus-rtu.png",{"path":129,"title":130,"date":131,"tags":132,"authors":134,"description":135,"meta":136,"image":143},"\u002Fblog\u002F2024\u002F12\u002Fpublishing-modbus-data-to-uns","How to Bridge Modbus to MQTT: Step-by-Step Guide","2024-12-04",[11,133,12],"uns",[14],"Learn how to bridge Modbus data to MQTT in 2026 and publish it to a Unified Namespace (UNS) using FlowFuse for real-time monitoring and cloud integration.",{"keywords":137,"excerpt":138},"modbus to mqtt, mqtt to modbus, node-red as gateway, bridging modbus to mqtt, modbus to uns, modbus data to unified namespace",{"type":19,"value":139},[140],[22,141,142],{},"Converting Modbus to MQTT unlocks the value trapped in legacy industrial equipment. Industrial facilities worldwide face a persistent challenge: their Modbus-based sensors, PLCs, and controllers generate valuable operational data, but that data remains isolated in local control networks, unable to feed modern cloud analytics, remote dashboards, or predictive maintenance systems.","\u002Fblog\u002F2024\u002F12\u002Fimages\u002Fhow-to-bridge-modbus-to-mqtt.png",{"path":145,"title":146,"date":147,"tags":148,"authors":152,"description":154,"meta":155,"image":162},"\u002Fblog\u002F2023\u002F05\u002Fintegrating-modbus-with-node-red","Best Practices Integrating a Modbus Device With Node-RED (2026)","2023-05-16",[149,150,151,12],"posts","node-red","how-to",[153],"andrew-lynch","Modbus is a widely adopted protocol for accessing data from existing legacy manufacturing equipment. Node-RED makes it very easy to connect to Modbus enabled equipment. However, there are some best practices we have developed to maintain system integrity when integrating Modbus devices with Node-RED",{"keywords":156,"excerpt":157},"modbus node-red, node-red modbus integration, node-red modbus tcp, modbus best practices, node-red industrial automation",{"type":19,"value":158},[159],[22,160,161],{},"The world of industrial automation is slow to adopt new technology. With legacy equipment already working and in place, paralyzing down-time costs, and fears of introducing instability into a plant, technology change has a cautious pace.","\u002Fblog\u002F2023\u002F05\u002Fimages\u002Fmodbus2.jpg",1785929976160]