====== Function Code 03 : Read Registers ======

This Function Code reads 1 or more 16-bit words.  The example below reads registers 1 ~ 3.

Query:

^ Field        ^  Data  ^  Number of Bytes  ^
|Slave Address |0x03 |1|
|Function Code |0x03 |1|
|Start Address HI |0x00 |1|
|Start Address LO |0x00 |1|
|Length HI |0x00 |1|
|Length LO |0x03 |1|
|Error Check |CRC |2|

Response: Because the //Length// field of the query was 3, the response returns 6 bytes.

^ Field        ^  Data  ^  Number of Bytes  ^
|Slave Address |0x03| 1|
|Function Code |0x03| 1|
|Byte Count |0x06| 1|
|Data 1 HI |0xAB| 1|
|Data 1 LO |0x67| 1|
|Data 2 HI |0xAB| 1|
|Data 2 LO |0x67| 1|
|Data 3 HI |0xAB| 1|
|Data 3 LO |0x67| 1|
|Error Check |CRC |2 |