User`s manual

112
Remark
The overview of the RS/CS controls are described.
1) When transmitting data
● The Q series C24 detects the modem/TA data reception capability from on/off of the CS (CTS) signal.
● When the CS (CTS) signal is on, data transmission from the Q series C24 starts or continues. When the CS (CTS) signal
is off, data transmission from the Q series C24 is interrupted.
2) When receiving data
● The Q series C24 side reception capability is notified to the modem/TA by the on/off of the RS (RTS) signal.
● When the RS (RTS) signal is on, the Q series C24 can receive data. Start/continue data transmission from the modem/TA
to the Q series C24. When the RS (RTS) signal is off, the Q series C24 cannot receive data. Cancel data transmission
from the modem/TA to the Q series C24.
● The on/off of the RS (RTS) signal is controlled by the following conditions of the Q series C24:
•OFF  ON control of the RS (RTS) signal: Performed when the OS area for reception data storage in the Q series
C24 becomes 64 bytes (default) or less.
•OFF  ON control of the RS (RTS) signal: Performed when the OS area for reception data storage in the Q series
C24 becomes 263 bytes (default) or more.
(l) Modem function error code storage area (address 545 (221H))
• Stores the error code when an error occurs during the modem function or abnormal signal (such as the
initialization/connection abnormal completion signal X13) turns on.
• Refer to the User's Manual (Basic) for the error codes.
(m) Modem function sequence status storage area (address 546 (222H))
• The current status during use of the modem function is stored as a number.
• See Page 126, Section 3.4.1 for storage values for the modem function sequence status when using the
modem.
(n) Number of data registrations for connection storage area (address 547 (223H))
• Stores in Flash ROM the number of registered data for connection used by the Q series C24 for the
connection processing with the partner device in order to perform data communication/notification. The
number of registrations is the number of data for connection registered to the Flash ROM by the user.
• The registration of data for connection is described in Page 139, Section 3.4.4.