Mitsubishi Electric MELSEC IQ-R series Reference Manual page 286

Communication example (communication protocol setting is format 1 to 4)
Send 2-word data (1234H, 5678H) to the external device from the CPU module under the following settings.
• Communication protocol setting: MC protocol (Format 1 to 4)
• Word/byte units designation: Word unit
(Response data)
Transmission data
1 2 3 4 5
31 32 33 34 35
H H H H H
Communication example (communication protocol is format 5)
Send 2-word data (1234H, 5678H) to the external device from the CPU module under the following settings.
• Communication protocol setting: MC Protocol (Format 5)
• Word/byte units designation: Word unit
(Response data)
Command Transmission data
01 21 12 34 56
H H H H H
13 SERIAL COMMUNICATION MODULE DEDICATED COMMANDS
284
13.6 On-demand function
6 7 8
36 37 48
H H H
78
H