A practical manufacturer-focused approach to Modbus register-map design, based on how PLC and BMS integrators actually consume a device interface.
A focused explanation of Modbus protocol offsets, one-based register numbers and 40001-style references with practical examples.
Learn why antenna orientation matters and how vertical versus horizontal placement can affect wireless links.
Practical RS-485 wiring checks for Modbus RTU installations that work intermittently, fail after expansion or never respond at all.
Compare 868 MHz and 2.4 GHz for building automation, including path loss, penetration, antenna size, congestion and typical use cases.
A practical method for finding why a valid Modbus response becomes the wrong engineering value in a PLC, BMS or commissioning tool.
A symptom-based Modbus RTU troubleshooting guide for no response, timeouts, exception replies, wrong values and intermittent communication.
A practical pre-release Modbus test plan that checks the interface from the customer's side instead of only proving that basic communication works.
The purpose of this site is to teach and share automation and programming knowledge through various tools, guides, and articles.
