Mitsubishi Electric CR800 Series Ethernet Function Instruction Manual page 65

 Destination unit I/O No.
Specify the access destination unit (fixed to 03FFH).
Example
When 03FFH is specified as the request destination unit I/O No.
ASCII code
Binary code
• When performing data communication in ASCII code
Send data in the order higher-order byte to lower-order byte.
• When performing data communication in binary code
Send data in the order lower-order byte to higher-order byte.
 Request destination multidrop station No.
Specify the access destination multidrop station (fixed to 00H).
Example
When 0 is specified as the request destination multidrop station No.
ASCII code
Binary code
3 Description of functions
3-39