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W-MBus Modems/Receiver/Repeater- Guide utilisateur / User guide version V1.8.2
9.2.2 Wireless M-Bus receiver AMR RS485
By default, the receiver is configured for T1 mode. Simply connect power and serial port and all T1 Wireless M-Bus frames will be transmitted on
the RS485 serial link (frame format is described in the User Module Guide Wireless M-Bus is available on the website adeunis®
).
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Warning, configuration changes can only be made in RS232 mode.
The green LED will be lit in power, and blinks when receiving data.
9.3. Wireless M-Bus DATA format
In each operating modes, the data format are the same. We are providing in the following lines, a short summary of the packet data format.
The link layer use IEC 60870-5-2 format class FT3.
9.3.1 Frame format
L-field
1 Byte
9.3.2 Optional second block
CI-field
1 Byte
9.3.3 Optional other block
or (L-9modulo 16) -1 if it is the last block
9.3.4 L : Length field
Length field (L = 0 to 255), which signals the total number of user bytes (excluding the length field and the CRC's).
9.3.5 C : Control Field
For transmit only devices (S1, T1 mode) the Cfield value C=0x44 (send-no-Reply)
In bidriectional mode, the C-field is managed by the module.
9.3.6 M: Manufacturer ID Field
User/manufacturer unique ID of the meters.
If M=ARF, the user/manufacturer must guarantee worldwide uniqueness address. Otherwise, the address is unique at least within maximum
transmission range.
9.3.7 A : Address
Unique address, user/manufacturer must guarantee it.
9.3.8 CI : Control Information Field
Must be set according to EN13757-3.
Examples :
•
0x72 M-Bus Application Layer with full header
•
0x78 M-Bus Application Layer without header, to be defined
•
0x7A M-Bus Application Layer with short header
•
...
C-field
1 Byte
DATA
or (L-9modulo 16) -1 if it is the last block
DATA
16
M-field
2 Bytes
16
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A-field
CRC-field
6 Bytes
2 Bytes
CRC-field
2 Bytes
CRC-field
2 Bytes
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