Converter Operation In Transparent Mode; Output Off Command; Packet With Request Of Settings - Vega Absolute M-BUS-1 User Manual

M-BUS-1 / User Manual

4. Converter operation in transparent mode

Commands sent by application on LoRaWAN port 2.
Size in bytes Field description
1 byte Packet type, this packet == 4
array Data
Upon receiving this packet, M-BUS-1 will transfer the data contained in it to the M-BUS
interface (depending on the model). If the external device connected via M-BUS interface
answers within the timeout specified in the M-BUS-1 settings, the response will be transferred
to the LoRaWAN network as one or more type 3 packets.
When using the on/off commands of the outputs and working in
transparent mode, the converter must power by an external power source
(operate as a class C device)
The LoRa data transfer technology places restrictions on the maximum packet size,
depending on the data rate at which the packet is transmitted. In this regard, the packet size
sent to the device should not exceed 51 bytes. If you want to send a larger packet, the external
application must make sure that the network server is running at the current data rate at which
the device is running, allowing you to send larger packets. The table below shows the
maximum package sizes for different data rates.
Data rate Spread factor
DR0 SF12
DR1 SF11
DR2 SF10
DR3 SF9
DR4 SF8
DR5 SF7

5. Output off command

Sent by application on LoRaWAN port 2.
Size in bytes Field description
1 byte Packet type, this packet == 5
1 byte Output no. (1 - 2)

6. Packet with request of settings

Sent by application on LoRaWAN port 3
Size in bytes Field description
1 byte Packet type, this packet == 1
Revision 15 – 30 June 2021
Maximum packet size
51 bytes
51 bytes
51 bytes
115 bytes
222 bytes
222 bytes
Data type
uint8
uint8
Data type
uint8
uint8
Data type
uint8
25