Transcription of Dedicated Application Layer (M-Bus)
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Dedicated Application Layer (M-Bus)
Application Layer M-Bus Page 1 of Application Layer (M-Bus)ForewordThis document has been prepared by the WG4 of CEN TC document is a working : This standard is a backward compatible enhancement to EN1434-3 and is interoperable with IntroductionThe bus communication system of EN1434-3 is commonly called M-Bus. Its Application Layer describesa standard especially for meter readout. It can be used with various physical layers and with link layersand network layers which support the transmission of variable length binary transparent first byte of an Application Layer telegram is the CI-field (Control Information) which distinguishesbetween various telegram types and Application functions. It is also used to distinguish between trueapplication Layer communication and management commands for lower layers.
W4B160201.DOC Application Layer M-Bus Rev.4 16.2.2001 Page 3 of 4849 Note that the CI-codes 50h, 52h, 5Ch, 70h, 71h, 78h, 7Ah, 80h, 81h, A0h-AFh and B8h-BFh are optional
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