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Article | REF: S8160 V1

Profibus network

Authors: Eddy BAJIC, Bruno BOUARD

Publication date: December 10, 2002

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4. DP and FMS telegram structure

Information is transmitted on Profibus-DP and Profibus-FMS networks in byte sequences called telegrams, consisting of a series of bytes controlled by an even parity bit and transmitted asynchronously, framed by a start (logic level 0) and stop (logic level 1) bit.

Each telegram byte is transmitted on 11 bits. The telegram format is based on the IEC 60870-5-1 standard, taking into account the choice of start and end characters, synchronization without pause between characters, parity bit and control key. The case of Profibus-PA telegrams 7.3

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DP and FMS telegram structure
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