Mitsubishi Electric MELSEC iQ-R Series User Manual page 175

Procedure for data communication
Line Connection Waiting side
Perform the processing up to
the modem/TA initialization.
Modem initialization
Line connection wait state Modem
initialization completion signal (X10 = ON)
Line connection completed
Connection signal (X12)=ON
Execute data communications.
Modem disconnection completed
Connection signal (X12)=OFF
Line connection wait stateModem
initialization completion signal(X10)=ON
If data communications is to be
executed again, carry out
communications after line
connection from the target device.
*1 Page 190 Line connection
*2 Page 199 Data communication
*3 Page 202 Line disconnection
C24 Modem
0
1
2
3
Line Connection*1
Remote password unlock processing
5
Data communication*2
Line disconnection*3
Remote password lock processing
3
* Shows the value stored for the modem function
sequence status (Address 546 (221H)).
indicates processing performed by the user.
Line Connection Side
C24
or
target
Modem
device
Perform the processing up to
the modem/TA initialization.
Modem initialization
Modem initialization completion signal (X10)=ON
Execute line connection.
Connection request signal (Y11)=ON
Line connection completed
Connection signal (X12)=ON
Execute data communications.
* If MC protocol communications are carried
out with the target device, when a remote
password is set in the RCPU, unlock the
remote password.
The line is disconnected after data
communications are completed.
Modem disconnection request signal (Y12)=ON
Modem disconnection completed
Modem disconnection signal (X14)=ON
Connection signal (X12)=OFF
Modem initialization completion signal (X10)=OFF
* By completing the line disconnection, lock
processing of the remote password is executed
automatically.
If data communications are to be
executed again, start the procedure
from the modem initialization.
7 COMMUNICATIONS BY THE MODEM FUNCTION
7.4 Startup of the Modem Function
7
173