BACnet/IP device not discovered in Niagara 4: a field checklist
Discover in the BACnet Device Manager comes back empty or misses controllers? Work through this checklist from the network up, in the order that finds faults fastest.
Building management systems, explained by someone who fixes them
Practical BMS knowledge from the field
Field-tested guides to Niagara 4, BACnet and Modbus, written by a working UK BMS engineer. Plus straight answers on getting into the industry, and plain-English guides for the FM teams who run the buildings.
Browse by topic
Niagara 4Stations, drivers, JACEs and supervisors: how to set them up and fix them.BACnetBACnet/IP and MS/TP networks, discovery, BBMDs and device numbering.ModbusRegister maps, data types and integrating meters and plant controllers.CareersGetting into BMS in the UK: routes, qualifications, cards and pay.For FM teamsPlain-English BMS guides for facilities managers and building owners.
Latest guides
Duplicate BACnet device instances: how to find and fix them
Controllers vanishing or values jumping between devices? A duplicate BACnet device instance is a likely cause. How to prove it and number a site properly.
Modbus in Niagara 4: register offsets, word order and data types
Reading the wrong register, or getting 2.4e-41 instead of 230 V? How to translate a manufacturer's Modbus map into Niagara points that read the right value first time.
How to become a BMS engineer in the UK (2026)
Realistic routes into BMS work in the UK: apprenticeships, moving across from electrical, HVAC or IT, the cards and courses that matter, and what jobs pay.
BMS glossary for FM managers: JACE, AHU, BACnet and the rest
Plain-English BMS terms for facilities managers, so you can follow what your BMS contractor is telling you and ask the right questions.