User`s manual

163
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.4 Start-up of the Modem Function
(3) Program example for line disconnection
A program example for line disconnection is shown below.
*1  Page 134, Section 3.4.3,  Page 139, Section 3.4.4,  Page 144, Section 3.4.5,  Page 148, Section
3.4.6,  Page 154, Section 3.4.7
*1
Line disconnection completion flag
is set upon normal completion
Performs error handling when D105 is
other than 0 (error code)
Registration of data for initialization
Registration of data for connection
Modem/TA initialization
Line connection
Data communication
Line disconnection command
When the modem disconnection
completion signal is ON, the error
code is read
Modem disconnection request signal
is set
When the modem disconnection
completion signal is OFF, the line
disconnection request signal is reset
When the modem disconnection
completion signal is ON, the request
signal is reset
To turn OFF the modem disconnection
completion (X14), a second is required
after the modem disconnection request
(Y12) is ON.
When any connection signal or
completion signal is ON, the modem
disconnection request signal is set
Various request signals are reset
Line disconnection processing
(Line disconnection from external
device)
Modem disconnection request signal
is reset
Ready flag is ON
Data communication enable flag is ON
The line disconnection enable flag is
ON
Y0: Transmission request signal
Y1: Reception data read complete signal
M0: Accessible flag
M50: Data communication enable flag
M70: Line disconnection enable flag
X0: Normal transmission completion signal
X1: Abnormal transmission completion signal
X3: Reception data read request signal
X4: Abnormal reception detection signal
X10: Initialization complete signal
X12: Connection signal
X1E: Ready signal
X1F: WDT error signal