B&B Electronics Command Response Protocol HVD100A3 Manual de usuario descargar pdf (Pagina 12)

8 HDV100A3 Command & Response Manual

B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104

Baud Rate Example

To set the PC baud rate to 57,600 baud, N,8,1, format the message as

follows.

Byte

Number

Byte

Value

Hex

Byte Function

Start of frame

Number of control bytes

Command byte (08 = internal command)

Function Bbte (01 = change baud)

UB3

Baud 1

Baud 2

Number of data bytes

Checksum

The first byte is the start of frame and always 01. Next is the number

of control bytes (05). There are 5 bytes in the control section (in gray). Byte

number 3 sets the HDV100A3 to an internal operation (08). Byte 4 is the

internal function to be executed; (01) is the change baud command. Bytes 5,

6, and 7 set the baud rate, parity, stop bits and word length. Next is the

number of data bytes, in this case there are no data bytes. Last is the

checksum, the value is the 8 bit addition of bytes 1 to 8.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 30 31

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B&B Electronics Command Response Protocol HVD100A3 Manual de usuario Pagina 12