Siemeca AMR ™ Network Node WTT16/WTX16 M-Bus ... - Armatec AB

Addressing
Primary Addressing
Secondary
Addressing
The network node supports primary and secondary addressing.
Primary addresses 0...250 can be assigned to the network node.
Primary address "0“ is preset by the manufacturer. In addition to the
assigned primary address, the network node also responds to test
address 254 and broadcast address 255. The primary address
always serves to address the M-bus connected network node itself.
The (virtual) devices stored in it can only be addressed through
secondary addressing. (See also Page 8.)
If the master sets the primary address to 253, the slaves will be
identified through the secondary address. The slave, for its part, will
respond with the correct primary address (provided that it has a
primary address). The devices stored in the network node do not
have any primary address and will equally respond on the M-bus
with primary address 253.
The secondary address succeeds the CI field (CI = 72) and is
always structured as follows:
Name Format Example
Device
4 bytes (BCD) 01234567
Identification
Manufacturer 2 bytes (binary) 3265h (12901dez.) = "LSE"
Code
Version 1 byte (binary) 01h
Medium 1 byte (binary) 0Eh
Table 2: Secondary Address on the M-bus
The example shown in Table 2 is transmitted on the M-bus in the
following order:
67 45 23 01 65 32 01 0E
Device
Identification
The device identification is always given as an 8-digit figure shown in
binary-coded decimal numbers (BCD).
18/56 For intra-company use only
Siemens
Netzwerkknoten WTT16/WTX16
Building Technologies The Network Node 09.03.2007