Fieldbus Primer

Explore the history of automation wiring from connection oriented control to field bus. See how field bus reduces cabling by wiring per device, using transmitter and receiver protocols.

Explore fieldbus network topologies including ring (daisy chain), mesh, star, fully connected, line, tree, and bus, and compare single master and multi master networks.

Understand single master versus multi master fieldbus networks, where a single master initiates requests and slaves respond. Multi master setups let multiple masters act as slaves.

Explore fieldbus protocols, including open and proprietary standards, and how they define data structure, decode physical signals, and enable interoperable building automation and industrial communication.

Understand BACnet interoperability building blocks and BIBBs, and how objects with data points and properties—present value, units, and resolution—guide client–server communication over IP or MEP.

Explore LonWorks as an international fieldbus standard, detailing network management tools, data points and standard network variable types, bindings, and IP or twisted-pair communication.

Discover KNX, the multi-master building automation protocol, and learn how data points and DPT types map to group addresses across twisted pair, IP, wireless, and power line media.

Discover enOcean: a wireless, energy-harvesting protocol for battery-free sensors, using compact data packets, device profiles, and a multi-master pairing system to activate actuators.

Compare four building automation protocols, examining media types, client mapping versus fixed objects, group addresses and data point types, bindings, and pairing for easy commissioning.

Learn how the SMI protocol enables manufacturer-independent motor and blind control, featuring two-wire communication, a five-wire cable, unique motor IDs, and bidirectional telegrams.

Explore Dali, a two-wire digital addressable lighting interface for lighting control, detailing devices per line, grouping up to 16 groups, and defining up to 16 light scenes for synchronized switching.

Compare smi and dali protocols for motor and lighting control, both using two-wire communication, up to 16 motors per line (smi) or 64 devices (dali), with groupings and predefined states.

Explores field bus cross communication with Modbus protocols, detailing the four data types: discrete input, coil, input register, holding register, and their read/write function codes.

Explain how SNMP enables building automation by using agents that report traps and a manager that issues get and set requests via PDUs, with MIBs and OIDs defining data points.

Compare modbus and snmp protocols, their master-slave versus agent-based models, data points in a tree under the management information base, and their building automation versus IT use.

Wraps up the fieldbus primer by clarifying fieldbus protocols and distinguishing fieldbus systems as key elements of modern building automation. Use this video as a reference and share feedback.