Mitsubishi MELSEC L Series User Manual page 18

3.4 Start-up of the Modem Function ............................................................................................................. 3-52
3.4.1 Start-up procedures when communicating data with external devices .......................................... 3-52
3.4.2 Initial settings of the serial communication module......................................................................... 3-55
3.4.3 Register/read/delete of the initialization data .................................................................................. 3-58
3.4.4 Register/read/delete of the data for connection .............................................................................. 3-63
3.4.5 Initialization of modem/TA (terminal adapter) ................................................................................. 3-68
3.4.6 Line connection ................................................................................................................................ 3-72
3.4.7 Data communication and notification .............................................................................................. 3-78
3.4.8 Line disconnection............................................................................................................................ 3-84
3.5 Sample Programs ................................................................................................................................... 3-87
3.5.1 Sample program for data communication-1.................................................................................... 3-88
3.5.2 Sample program for data communication-2.................................................................................... 3-94
3.5.3 Sample program for notification..................................................................................................... 3-103
4 RECEIVING DATA WITH AN INTERRUPT PROGRAM
4.1 Settings for Receiving Data Using an Interrupt Program ...................................................................... 4- 2
4.2 Interrupt Program Startup Timing ........................................................................................................... 4- 2
4.3 Reception Control Method Using an Interrupt Program ........................................................................ 4- 3
4.4 Programming........................................................................................................................................... 4- 4
4.4.1 Program example............................................................................................................................. 4- 4
4.4.2 Precautions when receiving data with an interrupt program........................................................... 4- 5
5 CHANGING SEND AND RECEIVE DATA LENGTH UNITS TO BYTE UNITS
(WORD/BYTES UNITS SETTING)
6 CHANGING THE DATA COMMUNICATIONS MONITORING TIMES
6.1 No-reception Monitoring Time (timer 0) Setting..................................................................................... 6- 2
6.2 Response Monitoring Time (timer 1) Setting ......................................................................................... 6- 7
6.3 Transmission Monitoring Time (timer 2) Setting .................................................................................... 6-10
6.4 Message Wait Time Setting.................................................................................................................... 6-13
7 DATA COMMUNICATIONS USING DC CODE TRANSMISSION CONTROL
7.1 Control Contents of DTR/DSR (ER/DR) Signal Control ........................................................................ 7- 2
7.2 Control Contents of DC Code Control.................................................................................................... 7- 4
7.3 Precautions when Using the Transmission Control Functions.............................................................. 7- 7
8 DATA COMMUNICATIONS USING HALF-DUPLEX COMMUNICATIONS
8.1 Half-duplex Communications.................................................................................................................. 8- 1
8.2 Data Transmission and Reception Timing ............................................................................................. 8- 2
8.3 Changing the Communication System................................................................................................... 8- 6
8.4 Connector Connections for Half-duplex Communications..................................................................... 8- 7
8.5 Half-duplex Communications Precautions ............................................................................................. 8- 8
A - 16
4- 1 to 4- 6
5- 1 to 5- 2
6- 1 to 6-13
7- 1 to 7- 8
8- 1 to 8- 8
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