Solution
Applying the Modbus RTU message frame to the command of "010300000002C40B", it can be split as follows:
Code: 010300000002C40B
Address: 01
Function: 03
Data: 00000002
CRC: C40B
| START | ADDRESS | FUNCTION | DATA | CRC CHECK | END |
| at least 3.5 character times | 8 bits | 8 bits | n x 8 bits | 16 bits | at least 3.5 character times |
You should consult with the device user manual how to interpret Data 00000002. Now, let's assume 0000 is the starting address and 0002 is the number of holding registers.
According to the Modbus standard, Function "03" means "Read Holding Registers." The corresponding LabVIEW function is "
Read Holding Registers VI ".
Enter 0000 to the input terminal of "starting address" and 0002 to that of "number of holding registers" of the function.
