User`s manual

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CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
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3.4 Start-up of the Modem Function
(3) Precautions for performing data communication and notification
(a) When communicating data with the external device
• When setting the no-communication interval time to infinite wait (set value=0) in the initial setting of Q series
C24, be sure to perform line disconnection after the completion of data communication.
• Only the no procedure protocol/bidirectional protocol data communication can be performed in the
programmable controller CPU with Q series C24 installed.
• The Q series C24 automatically performs line disconnection processing if no data exchange is performed
during the no-communication interval time. The connection in progress signal (X12) and the modem
initialization completion signal (X10) turn off and the modem disconnection completion signal (X14) turns on
when the line disconnection processing is performed.
(b) When notifying to pager receivers
• Turn on the notification-issued request signal (Y14) before the Q series C24 modem/TA initialization is
completed.
• Notification processing is conducted when the notification-issued request signal (Y14) turns from ON to OFF
after the completion of modem/TA initialization. Therefore, notification processing is conducted when the
programmable controller CPU of the station with Q series C24 installed is in stop status, or the
programmable controller CPU stops due to error, since the notification-issued request signal (Y14) is turned
off in either case. Write the data number for connection in the initial setting for GX Configurator-SC.
• When the notification-issued request signal (Y14) is turned OFF from ON before initialization of the Q series
C24 modem/TA, the processing will end abnormally.
• When the notification-issued request signal (Y14) is turned OFF from ON during initialization of the Q series
C24 modem/TA, notification processing will be conducted after the completion of the modem/TA initialization.
• Notification processing is completed in the order of line connection, message transmission, and line
disconnection from Q series C24 for the transmission station of the radio wave to the notification destination.
Therefore, even if the power to the notification destination equipment is off, the notification processing will
end normally as long as the above processing is completed.
• When the notification-issued request signal (Y14=ON) is turned ON before notification processing is
complete, some messages may not be sent.
Turn on the notification-issued request signal (Y14) before the initialization processing of the Q series C24 modem/TA is
completed, and turn it off after the initialization complete signal (X10) is turned ON (notification request).