User`s manual

69
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.1 Overview
CHAPTER 3 COMMUNICATIONS BY THE MODEM
FUNCTION
This chapter explains the overview and how to use the modem function, which can be used for data communication
with remote external devices and paging pager terminals.
3.1 Overview
The overview of the modem function is described below:
(1) The modem function easily performs data transmission/reception to remote
devices via public lines/office telephone systems/digital lines (ISDN) by
connecting a modem or TA (terminal adapter) to the Q series C24's RS-232
interface.
(a) Communicating arbitrary data with an external device
(b) Call pager receiver (beeper) to notify the programmable controller system
maintenance information.
(2) Initialization of the modem or TA, line connection (dialing), and line
disconnection are performed using the programmable controller CPU.
(3) Once the line is connected, data communication with the external device via
public line/office telephone system/digital line, or a call to pager receiver can
be made.
*1
RS-232
Modem/TA
(*1)
Pager receiver
Q series C24
TA: terminal adapter
External device
Modem/TA
(*1)