Direct Digital Control Of Building Systems From a brief historical look at the evolution of DDC to some thoughts on the future uses of artificial intelligence and fuzzy logic, this practical new work provides a systematic discussion of the theory and application possibilities of:


? Sensors and actuators--for temperature, humidity, pressure, flow, and indoor air quality;


? DDC hardware--including microprocessors, microcomputers, and microcontrollers;


? DDC software--operating system, utility, and applications software and the methods of configuring DDCs;


? The operator-machine interface--for field devices, workstations, and multivendor displays;


? Data communication systems for DDC--hardware, software, protocols and the ISO's Open Systems Interconnection 7-layer architecture;


? BACnet--ASHRAE's building automation and control networking protocol, from its design philosophy and the communication services it provides, to issues of extensibility, conformance, and specification;


? DDC design methodology--a complete case study, showing how to build system schematics, I/O and mode summaries, and logic flow diagrams;


? DDC implementation--issues of design, specification, installation, commissioning, training, and operation and maintenance.