User`s manual

3.1.2 Function list

The following lists the overview of the modem function:

Function Overview

Modem/TA initialization

Initializes the modem/TA using the user-designated initialization data (AT command). (Auto initialization of the modem / TA is

possible.)

Line connection (dialing)

Dials the partner telephone number according to the user-designated connection data and enables data communication after

establishing the line connection.

When the modem/TA is not initialized, performs initialization.

Data communication

Performs communication with an external device using the MC protocol, non procedure protocol

or bidirectional protocol.

Communication method:

full-duplex communication

Synchronization method:

start-stop synchronous

system (asynchronous)

Performs communication with the partner Q series C24-installed station by modem/TA

connection using non procedure protocol or bidirectional protocol. (Station-to-station

communication)

Enables the communication between GX Developer and programmable controller via Q series

C24.

Notification Calls and transmits messages to the pager receiver.

Line disconnection Forcefully disconnects the line from the connected destination device.

Flash ROM reading, writing

(registration) and deletion

Reads, writes (registers) and deletes the initialization data (AT command) and data for connection from/to the Flash ROM in the

Q series C24 according to the request from programmable controller CPU.

Remote password check

Allows the Q series C24 to execute the remote password check set in the QCPU when there is communication from the

external device to the Q series C24 using MC protocol or the programmable controller is accessed using GX Developer.

Callback

After line connection from GX Developer, access to the QCPU from GX Developer is made possible through line reconnection

from the Q Series C24 (callback). Transmission costs after line connection from the Q Series C24 side are borne by the Q

Series C24 side.