User`s manual

145
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.4 Start-up of the Modem Function
2) Output count designation area (address: 185/345 (B9H/159H)): The number of data for initialization units to be
transmitted starting from the location set by the output head pointer designation area is designated here.
• 1: Transmitted form the first unit to 100: Transmitted from the 100th unit
(3) Precautions during modem/TA initialization
If the DSR signal from the modem/ TA goes OFF when modem/TA initialization is completed (X10 goes ON), the
Q Series C24 executes initialization processing automatically in accordance with the following.
• If the auto modem initialization is specified
Modem / TA initialization processing is executed in the initialization / connection timeout time interval while the
DSR signal is OFF without relation to the ON/OFF status of the modem initialization request signal Y10.
• If the auto modem initialization is not specified
The modem / TA initialization processing is executed when the DSR signal restarts without relation to the
ON/OFF status of the modem initialization request signal Y10.
(4) If modem / TA initialization is executed automatically (Set by the GX
Configurator-SC)
By having the GX Configurator-SC perform the settings for automatic modem initialization, modem initialization is
executed automatically when the Q Series C24 starts up.
The modem initialization completion signal (X10) goes ON.
(a) Settings for auto initialization of the modem / TA
Select "auto initialize" for the auto modem initialization designation in the GX Configurator-SC's "Modem
function system setting" screen.
(b) Cautions when initializing the modem / TA automatically
• If the modem's initialization processing is completed abnormally, the Q Series C24 executes the following
processing.
• The initialization / connection abnormal completion signal (X13) does not go ON.
• An error code is stored in the buffer memory's modem function error code storage area (Address: 545
(221H)).
• Modem initialization is retried automatically using the initialization / connection timeout time stored in the
buffer memory (address: 50 (32H), and is repeated until initialization is completed normally.
*1
*1 When modem initialization is not completed normally, the user should perform the following, and restart the station
where the Q Series C24 is installed.
Check the set initialization data No.
Check the registered contents of the initialization data corresponding to the set initialization data No. (If they are
abnormal, correct them and register them again.)
Check if the modem's power is turned on.
• When the line is disconnected from the Q Series C24 side (using Y12), the initialization completion signal
(X10) goes off together with the connection in progress signal (X12). When connecting to the line again, do
so after first initializing the modem.
When the line to the Q Series C24 is disconnected from the external device side, the Q Series C24's initialization completion
signal (X10) does not go OFF.
When desiring to disable reception by the Q Series C24 side's modem, execute line disconnect by the modem disconnection
request signal (Y12).