User`s manual

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CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.3 Specifications
(9) Number of modules for which the remote password check can be set
A maximum of eight modules can be registered with remote passwords in the QCPU.
*1
To set the remote password in a module, use the GX Developer remote password setting screen.
*1 The remote password modules are as follows:
•Q series C24
• Q series Ethernet module
• Built-in CPU of Ethernet port
(10)Callback function
(a) When the number of callback processing denials exceeds callback denial
notification accumulated count (buffer memory address 8194 (2002H), the following
processing is executed each time the Q Series C24 issues another refusal.
• An error code (7FE9H) is stored in the buffer memory's modem function error code storage area (address
545 (221H).
• The CHn side error occurrence signal (XE/XF) turns ON and the ERR LED lights up.
(b) When the number of callback processing refusals exceeds callback denial
notification accumulated count, after performing the following checks and clearing
processing, make the line connection again from GX Developer.
• Check the setting contents of the callback function set in the Q Series C24.
• Check the setting contents of the callback function set in GX Developer.
• The user should clear the accumulated counts stored in the following buffer memory areas.
(Applicable buffer memory)
Callback denial accumulated count: Address 8945 (22F1H)
(How to clear) Cleared by the user using one of the following:
• Set the accumulated count to "0" using the GX Configurator-SC modem function monitor/test screen.
• Write "0" to the applicable area of the buffer memory.
Remark
Refer to the User's Manual (Basic) for the method for turning off the Q Series C24's ERR LED when it lights up.
(11)Preventing a line disconnect when GX Developer is connected
Perform the following settings and operations to prevent a line to the modem from disconnecting even if
communication between GX Developer and programmable controller is interrupted.
(a) Initial setting by GX Configurator-SC
• Setting screen: Modem function system setting screen
• Setting item: No-communication interval time designation
• Setting value: 0 (infinite wait)
(b) Operation using GX Developer
Always perform the line disconnect operation when the GX Developer on-line operation is completed after the
line to the Q series C24 side is connected.