User`s manual

155
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.4 Start-up of the Modem Function
Remark
This section explains the general procedure for non procedure protocol/bidirectional protocol (executed in full-duplex
communication) data communication using the modem function between the programmable controller CPU with Q series
C24 installed.
(General Procedure)
1) Perform initial setting for Q series C24 at both station A and station B.
2) Perform modem/TA initialization in station B.
3) Perform modem/TA initialization and line connection in station A.
4) Communicate data using the non procedure protocol/bidirectional protocol.
5) In order to end the communication, disconnect line from station A that initiated the line connection.
QJ71C24-R2
CH1.
CH2.
CH1.
CH2.
Q25HCPU
MODE
RUN
ERR.
USER
BAT.
BOOT
RS-232
USB
QJ71C24-R2
CH1. CH2.
CH1.
CH2.
Q25HCPU
MODE
RUN
ERR.
USER
BAT.
BOOT
RS-232
USB
Modem
Modem
Public line
Station A Station B
RS-232
cable
RS-232
cable