Line Disconnection - Mitsubishi MELSEC L Series User Manual

3.4.8 Line disconnection

Host station Communication
Initialization
X10
completion
Connection in
X12
progress
Modem
Y12
disconnection request
Modem disconnection
X14
completion
RS-232 CD terminal
External station (Q series C24)
Initialization
X10
completion
Connection in
X12
progress
Modem
Y12
disconnection request
Modem disconnection
X14
completion
RS-232 CD terminal
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This section explains the line disconnection upon communication completion when
communicating data with the external device using the modem functions.
In case of notification to pager receivers, since the line will be disconnected at the end
of the notification processing, the disconnection processing such as I/O signal
disconnection request (Y12) is unnecessary.
(1) I/O signal used
Uses modem disconnection request signal (Y12) and modem disconnection
completion signal (X14).
Disconnection
(ON)
(OFF)
(OFF)
This is the procedure to take in order to turn off the initialization complete signal (X10).
In the case of Q series C24, when the line is disconnected from the external device,
the initialization complete signal (X10) at the local station is not turned OFF.
3 COMMUNICATIONS BY THE MODEM FUNCTION
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