Rixen TK-6200, Instruction Manual, Page: 9 / 12

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RS-232 transfer protocol
RS-232 The transmission end is one way transfer via the three wire
(touch ground) to input and output.
Using the original transmission line or cable under 10m is recommended.
Baud rate: 57600, 19200, 9600, 4800
Transfer status: / 8 / N / 1
Transfer content: (8BIT)
Read Holding Registers by Function 03H
A. Request Data Frame
Ex: Read the data from address 0x0000 (Read 4-byte of data from address 0x0000)
Slave
address
Function
Starting
address
Hi
Starting
address
Lo
No. of
Byte
Hi
No. of
Byte
Hi
CRC
Lo
CRC
Hi
02H 03H 00H 00H 00H 04H 44H 3AH
Response Data Frame
Ex Response value=4-Byte Response Data= ”80003”
Slave
address
Function
Byte
count
Data
Hi
Data
Middle
Data
Lo
Data
Last
CRC
Lo
CRC
Hi
02H 03H 04H 00H 01H 38H 83H CAH 92H
0x00013883=80003，Real value = 80003/100，Real value =800.03
B. Request Data Frame
Ex: Read the data from address 0x0000 (Read 8-byte of data from address 0x0000)
Slave
address
Function
Starting
address
Hi
Starting
address
Lo
No. of
Byte
Hi
No. of
Byte
Hi
CRC
Lo
CRC
Hi
02H 03H 00H 00H 00H 08H 44H 3FH
Response Data Frame
Ex Response value= 8-Byte Response Data =”80003”and”81067”
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