Direct Digital Control — (DDC) refers to the ability to control HVAC (Heating, Ventilating, and Air Conditioning) devices via microprocessors containing a software performing the control logic. DDC receive analog and digital inputs from the sensors and devices installed… … Wikipedia
Direct digital control — (DDC) is the automated control of a condition or process by a digital device (computer).[1][2] A very early example of a DDC system meeting the above requirements was completed by the Australian business Midac in 1981 1982 using R Tec Australian… … Wikipedia
Direct electricity load control — The utility installs a radio controlled device on the HVAC equipment. During periods of particularly heavy use of electricity, the utility will send a radio signal to the building in its service territory with this device and turn off the HVAC… … Energy terms
control system — Means by which a set of variable quantities is held constant or caused to vary in a prescribed way. Control systems are intimately related to the concept of automation but have an ancient history. Roman engineers maintained water levels in… … Universalium
Direct memory access — (DMA) is a feature of modern computers that allows certain hardware subsystems within the computer to access system memory independently of the central processing unit (CPU). Without DMA, the CPU using programmed input/output is typically fully… … Wikipedia
Load balancing (computing) — Load balancing is a computer networking methodology to distribute workload across multiple computers or a computer cluster, network links, central processing units, disk drives, or other resources, to achieve optimal resource utilization,… … Wikipedia
Interruptible load — 1) This Demand Side Management category represents the consumer load that, in accordance with contractual arrangements, can be interrupted at the time of annual peak load by the action of the consumer at the direct request of the system… … Energy terms
Direct Client-to-Client — (DCC) is an IRC related sub protocol enabling peers to interconnect using an IRC server for handshaking in order to exchange files or perform non relayed chats. Once established, a typical DCC session runs independently from the IRC server.… … Wikipedia
Other load management — Demand Side Management (DSM) program other than Direct Load Control and Interruptible Load that limits or shifts peak load from on peak to off peak time periods. It includes technologies that primarily shift all or part of a load from one time… … Energy terms
Control table — This simple control table directs program flow according to the value of the single input variable. Each table entry holds a possible input value to be tested for equality (implied) and a relevant subroutine to perform in the action column. The… … Wikipedia
