Hamilton-sundstrand-company Fuel Metering Valves XVG Manuel d'utilisateur télécharger pdf (Page 8)

Example: Request to read holding registers 108 - 110

Request Response

01 03 00 6B 00 03 74 17 01 03 06 02 2B 00 00 00 64 05 7A

Slave Address 01 Slave Address 01

Function 03 Function 03

Starting Address Hi 00 Byte Count 06

Starting Address Lo 6B Register Value Hi (108) 02

Number of Registers Hi 00 Register Value Lo (108) 2B

Number of Registers Lo 03 Register Value Hi (109) 00

CRC 7417 Register Value Lo (109) 00

CRC 057A

Table 6: Modbus Function 03 - Example

7.4.2 Write Single Register (0x06)

Request message:

SLAVE ADDRESS + FUNCTION CODE + REGISTER ADDRESS + REGISTER

VALUE + CRC

Request Length Valid Value

Slave Address 1 Byte 0 to 247

Function code 1 Byte

0x06

0x0000 to 0xFFFF

CRC 2 Bytes

0x0000 to 0xFFFF

Table 7: Modbus Function 06 - Request Message

Response message:

SLAVE ADDRESS + FUNCTION CODE + REGISTER ADDRESS + REGISTER

VALUE + CRC

Response Length Valid Value

Slave Address 1 Byte 0 to 247

Function code 1 Byte

0x06

0x0000 to 0xFFFF

CRC 2 Bytes

0x0000 to 0xFFFF

Table 8: Modbus Function 06 - Response Message

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 35 36

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Hamilton-sundstrand-company Fuel Metering Valves XVG Manuel d'utilisateur Page 8