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3 COMMUNICATIONS BY THE MODEM FUNCTION
(2) Procedure when executing data communications
indicates processing
performed by the user.
Line Connection Waiting side
Line Connection Side
Q Series C24
Perform the processing up to the
modem/TA initialization by the
procedure in (1).
Modem
Modem
Q Series C24
or
External Device
Perform the processing up to the
modem/TA initialization by the
procedure in (1).
0
1
Modem initialization
Modem initialization
Line connection wait state
Modem initialization completed
signal (X10 = ON)
2
3
Modem initialization
Modem initialization completed signal
(X10)=ON
Execute line connection.
Line Connection
(See Section 3.4.6.)
Line connection request signal (Y11)=ON
Line connection completed
Line connect signal (X12)=ON
Line connection completed
Line connect signal (X12)=ON
Execute data communications.
Execute data communications.
Remote password unlock processing
5
Data communications
(See Section 3.4.7.)
Line disconnection
(See Section 3.4.8.)
The line is disconnected after
data communications are
completed.
Line disconnect request signal (Y12)=ON
Line disconnection completed
Line disconnect signal (X14)=ON
Line connect signal (X12)=OFF
Modem initialization completed signal (X10)=OFF
Line disconnection completed
Line connect signal (X12)=OFF
Remote password lock processing
Line connection wait state
Modem initialization completed
signal (X10)=ON
If MC protocol communications are carried
out with the external device, when a remote
password is set in the QCPU, unlock the
remote password.
3
If data communications is to be
executed again, carry out
communications after line connection
from the external device.
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.
Shows the value stored for the modem function
sequence status (Address 546 (221H)).
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