Practical Industrial Data Networks:Design, Installation and ...

Filled cableFIPFirmwareFlame retardancyFlow controlAppendix A – Glossary 305a telephone cable construction in which the cable core isfilled with a material that will prevent moisture from enteringor passing along the cablefactory instrumentation protocola computer program or software stored permanently inPROM or ROM or semi-permanently in EPROMthe ability of a material not to propagate flame once the flamesource is removed.the procedure for regulating the flow of data between twodevices preventing the loss of data once a device’s buffer hasreached its capacityfieldbus message specificationFMSFNCfunction byteFrame the unit of information transferred across a data link –typically, there are control frames for link management andinformation frames for the transfer of message dataFrequency modulationFrequencyFRMRFSKFull-duplexa modulation technique (abbreviated to FM) used to allowdata to be transmitted across an analog network where thefrequency is varied between two levels – one for binary ‘0’and one for binary ‘1’– also known as frequency shift keying(or FSK)refers to the number of cycles per secondframe rejectfrequency shift keying, see frequency modulationsimultaneous two-way independent transmission in bothdirections (4 wire) – see DuplexG giga (metric system prefix – 109)Gatewaya device to connect two different networks that translates thedifferent protocolsGMSKGaussian minimum shift keyingGPIBgeneral purpose interface bus – an interface standard used forparallel data communication, usually used for controllingelectronic instruments from a computer – also known as IEEE488 standardGroundan electrically neutral circuit that has the same potential asthe earth – a reference point for an electrical system alsointended for safety purposesHalf-duplexHamming distanceHandshakingHardwareHARTtransmissions in either direction, but not simultaneouslya measure of the effectiveness of error checking – the higherthe Hamming distance (HD) index, the safer is the datatransmissionexchange of predetermined signals between two devicesestablishing a connectionrefers to the physical components of a device, such as acomputer, sensor, controller or data communications system–these are the physical items that one can seehighway addressable remote transducers