Mitsubishi Electric MELSEC iQ-R Series User Manual page 358

(0) Set the transmission channel to CH1.
Set the send data quantity to 2.
Set the data to be transmitted in D10 to D11.
Set the transmission direction.
(10) Execute transmission.
(55) Normal completion
(57) Abnormal completion
17 COMMUNICATING WITH ASCII CODE (ASCII-BIN CONVERSION)
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17.4 Data Communication Using Nonprocedural Protocol