Category Archives: Blog

Here are top 10 free Modbus troubleshooting tools & software for troubleshooting and testing Modbus (RTU, TCP, ASCII) networks — all useful for diagnostics, simulation, or monitoring. I include a brief description of what each tool offers and why it’s worth considering. 1. OpenModScan Free/open-source Modbus Master (client) utility supporting both Modbus-TCP and Modbus-RTU. You can use it… Read More »

When setting up a Modbus network, one of the key decisions is choosing the right physical communication layer — RS-485 vs Ethernet. Both options support the Modbus protocol (Modbus RTU for RS-485 and Modbus TCP for Ethernet), but they differ in wiring, speed, distance, and application. This article explains the differences between RS-485 vs Ethernet for Modbus communication… Read More »