Direct Digital Control of Building Systems

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.