Mitsubishi Electric MELSEC iQ-R Series User Manual page 220

(0) Accessible
(3) Initialize the modem.
(31) Set the transmission channel.
Set the send data quantity.
Set the send data.
Issue the transmission execution direction.
(100) Normal completion
(103) Abnormal completion
(109) Set the reception channel to CH1.
Issue the reception execution direction.
(173) Normal completion
(177) Abnormal completion
7 COMMUNICATIONS BY THE MODEM FUNCTION
218
7.5 Sample program