Rs-232 Baud Rate Setup - B&B Electronics Command Response Protocol HVD100A3 Product Manual

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 Control Command
of Bytes Code
Frame
Byte # 1 2 3
Value 01 05 08
Setting UB3
Bit 7 Bit 6 Bit 5
Divisor Set Set
Latch Break Parity
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
*
0
0
1
1
Bit 2, stop bit, works in conjunction with bits 1 and bit 0
Bit 2
0
1
1
HDV100A3 Command & Response Manual-1306cr
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Function UB3 Baud
Code 1
4 5 6
01
Bit 4 Bit 3 Bit 2
Even Parity Stop
Parity Enable Bits
Bit 4 Bit 3 Parity Selection
* 0 No parity (default)
0 1 Odd parity
1 1 Even parity
0 1 Force parity "1"
1 1 Force parity "0"
*Don't care state.
Word Length (bits)
5,6,7,8
5
6,7,8
Baud Data Check
2 Bytes Sum
8 9 10
00
Bit 1 Bit 0
Word Word
Length 1 Length 0
Stop Bit Length
1 (default)
1½
2
5