Sontex Supercom 646, Руководство пользователя

Страница: 20 / 48

Manual Supercom 646 GPRS rev. 04-02-2011 20
7. M-Bus communication protocol
7.1 Introduction
The Supercom 646 Radio Central uses the M-Bus European Norm EN1434 protocol to communi-
cate.
The M-Bus protocol supports a secondary addressing. For more information, please refer to the M-
Bus documentation on the internet at the following site:
http://www.m-bus.com/
7.2 Memory distribution of the central
The memory of the radio central can be defined by three distinct parts. Each of these parts can be
addressed according to the M-Bus protocol in reading and writing or only in reading.
1. Data containing the configuration of the central (reading and writing)
2. Data containing the list of memorized devices (reading and writing)
3. Data containing the data of devices read by the central (reading)
7.3 Reading concept
The radio central is seen as 2 distinct devices:
1. The central itself.
2. The read device whose read data is saved in the memory of the central.
The Supercom 646 sends several blocks. The 2 first blocks are dedicated for the central. The fol-
lowing blocks depend on the amount of radio devices contained in the list of the radio central:
1. Frames n°1 and n°2 for the central
2. Frames n°3…n°xx contain the list of radio device s read by the central. There are four devices
per frame.