User`s manual

147

CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION

3.4 Start-up of the Modem Function

(b) Modem/TA initialization program example

An example of the modem/TA initialization program on the Q series C24 side by the programmable controller

CPU is shown below.

*1 When the initialization data has been registered from GX Configurator-SC or from the programmable controller CPU.

X1E: Ready signal

Modem initialization command

Sets the initialization request flag

Turns the ready flag ON

X12: Connection in progress signal

X1F: WDT error signal

M0: Accessible flag

M1: Data registration complete flag

for initialization

M30: Initialization enabled flag

Turns the modem initialization enabled

flag ON

Sets the initialization request signal

Sets the initialization completed flag

Reads the error code at initialization

abnormal completion

Resets the flag with the clear command