Adeunis RF LoRaWAN MODBUS MASTER ARF8240AA, Руководство пользователя, Страница: 64 / 80

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sigfox MODBUS MASTER - Guide utilisateur / User guide version V1.0.1
64 Page of 80
FR
• Response frame (0x31) from the product:
0 1 2 3 4 5 ... 11
Code PAYLOAD PAYLOAD
0x31 Status VALUE 1 VALUE 1 VALUE 2 VALUE 3 VALUE 3 X
In this example: CONF ID1 is a 2-byte register, CONF ID2 a 1-byte register and CONF ID3 a 2-byte register.
If an error is detected in the request, the returned 0x31 frame will be empty.
4.1.6 Periodic data frame
This frame (0x46) is transmitted at the frequency defined in register S301 and contains all the configured Modbus periodic data.
The organization of the bytes in this frame therefore depends on the configuration of the user by following the scheduling of the defined
MODBUS frames.
This frame has a maximum of 5 2-byte registers.
0 1 2 to 3 4 to 5 6 to 7 8 to 9 10 à 11
Code PAYLOAD PAYLOAD
0x44 Cf Status
Modbus
register 1
Modbus
register 2
Modbus
register 3
Modbus
register 4
Modbus
register 5
Its size is of 12 bytes.
Description of the frame :
• Bytes 2 to 3 : VALUE of the first register in the order of the configuration defined in registers 330 to 334
• Bytes 4 to 5 : VALUE of the second register in the order of the configuration defined in registers 330 to 334
• …
• Bytes 10 to 11 : VALUE of the fifth register in the order of the configuration defined in registers 330 to 334
Using the configuration example in paragraph 2.2.1 as follows:
Register VALUE encoding VALUE Result
S301 Decimal 180 Periodic mode with a period of 180x20s = 3600 seconds =
1h
S322 Decimal 200 The supply time of the external load (slave) before the
Modbus request is 200x100 = 20000ms ie 20s
S330 Hexadecimal 0x01151802 Periodic data 1 configuration:
• Slave address = 0x01
• First register address = 0x1518
• Modbus registers type : holding registers
• Number of registers = 2
S331 Hexadecimal 0x570ED814 Periodic data 2 configuration:
• Slave address = 0x57
• First register address = 0x0ED8
• Modbus registers type : input registers
• Number of registers = 3
The result frame is:
0 1 2 to 3 4 to 5 6 to 7 8 to 9 10 to 11
Code Status PAYLOAD
0x44 Cf Status Modbus register
0x1518 of slave
0x01 Modbus register
0x1519 of slave
0x01 Modbus register
0x0ED8 of slave
0x57 Modbus register
0x0ED9 of slave
0x57 Modbus register
0x0EDA of slave
0x57
0x44 0xB1 0x1234 0x5A20 0x3F41 0x6D72 0xE042