Vega SI-13-232, Руководство пользователя, Страница: 25 / 31

VEGA SI-13/User Manual
25
Revision 08 – 04 May 2018
4 bytes Reserve
4 bytes Reserve
3. Data packet from an external device, received via RS-232 or RS-485 interface
Size in bytes Field description
1 byte Packet type, this packet = 3
2 bytes Total data size received via interface
1 byte Data size in this packet
1 byte Packet ordinal number
1 byte Total quantity of packets
Array Data
The LoRa data transfer technology limits the maximum packet size, depending on the
speed of packet transmission. If the readings log cannot be sent in one packet, it is divided into
several packets, which are sent in series until the entire requested log is sent. Records in the log
packet are arranged from the newest to the oldest.
4. Packet with current readings from connected meter Merkuriy 206, sent regularly or
on request
Size in bytes Field description
1 byte Packet type, this packet = 4
1 byte Meter address
4 bytes Result (1 – success, 0 – fail)
4 bytes Reading rate 1
4 bytes Reading rate 2
4 bytes Reading rate 3
4 bytes Reading rate 4
5. Packet with the confirmation of the execution of the command
Size in bytes Описание поля
1 byte Packet type, this packet = 5
1 bytes Command code which must be confirm
1 byte Result of the execution (1 – success, 0 - fail)