B&B Electronics Command Response Protocol HVD100A3 Manuale Utente Scaricare il pdf (Pagina 9)

HDV100A3 Command & Response Manual 5 Cover Page

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

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

RS-232 Baud Rate Setup

To set the baud rate for the RS-232 port, set a general command code of 08.

Set the function code to 01. Then set 3 control bytes as follows.

Function

Start

Frame

Control

Bytes

Command

Code

Function

Code

UB3

Baud

Data

Bytes

Check

Sum

Byte #

Value

Setting UB3

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Divisor

Latch

Set

Break

Set

Parity

Even

Parity

Enable

Stop

Bits

Word

Length 1

Word

Length 0

Bit 7 = 1 allows baud rate divisor to be changed. 0 baud rate change is

blocked. Bit 7 should not be set. The setting and resetting of this bit is

handled internally.

Bit 6 = 1 forces the transmitter output to a logic 0 for alerting the remote

receiver to a line break. 0 indicates no break condition.

Bit 5, 4 and 3 work together to set parity

Bit 5

Bit 4

Bit 3

Parity Selection

No parity (default)

Odd parity

Even parity

Force parity “1”

Force parity “0”

*Don’t care state.

Bit 2, stop bit, works in conjunction with bits 1 and bit 0

Bit 2

Word Length (bits)

Stop Bit Length

5,6,7,8

1 (default)

1½

6,7,8

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 30 31

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B&B Electronics Command Response Protocol HVD100A3 Manuale Utente Pagina 9

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