Modbus Blog
Practical guides on Modbus protocol, testing, and troubleshooting for engineers and developers.
What is Modbus Protocol? A Complete Guide
A comprehensive introduction to Modbus protocol — its history, how it works, the master-slave architecture, and why it remains the standard for industrial communication.
Read more →Modbus TCP vs RTU vs ASCII: Key Differences
Compare the three main Modbus variants — TCP/IP, RTU, and ASCII. Understand when to use each protocol and how they handle framing, addressing, and error checking.
Read more →How to Test Modbus Devices: Step-by-Step Guide
Learn how to test Modbus devices effectively using poll simulators and diagnostic tools. Covers connection setup, reading registers, writing values, and verifying communication.
Read more →Modbus Register Types: Coils, Inputs & Holding Registers
Understand the four Modbus data types — coils, discrete inputs, input registers, and holding registers. Learn their address ranges, function codes, and practical uses.
Read more →5 Best Modbus Simulator Tools in 2026
A comparison of the top Modbus simulator and poll tools available in 2026. Features, pricing, and protocol support compared side by side.
Read more →Modbus Troubleshooting: Common Errors and Fixes
Diagnose and fix the most common Modbus communication errors including timeouts, CRC failures, illegal function codes, and connection problems.
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