14. COMMUNICATION FUNCTION
14 - 1
14. COMMUNICATION FUNCTION ..............................................................................................................2
14.1 Structure ................................................................................................................................................3
14.1.1 Configuration diagram ...................................................................................................................3
14.1.2 Precautions for using RS-422/RS-232C/USB communication function .......................................5
14.2 Communication specifications ..............................................................................................................6
14.2.1 Outline of communication ..............................................................................................................6
14.2.2 Parameter setting ...........................................................................................................................6
14.3 Protocol ...................................................................................................................................................7
14.3.1 Transmission data configuration ...................................................................................................7
14.3.2 Character codes ...............................................................................................................................8
14.3.3 Error codes ......................................................................................................................................9
14.3.4 Checksum ........................................................................................................................................9
14.3.5 Time-out processing ........................................................................................................................9
14.3.6 Retry processing ............................................................................................................................10
14.3.7 Initialization ..................................................................................................................................10
14.3.8 Communication procedure example ............................................................................................11
14.4 Command and data No. list ................................................................................................................12
14.4.1 Reading command .........................................................................................................................12
14.4.2 Writing commands ........................................................................................................................18
14.5 Detailed explanations of commands ...................................................................................................20
14.5.1 Data processing .............................................................................................................................20
14.5.2 Status display mode ......................................................................................................................21
14.5.3 Parameter ......................................................................................................................................22
14.5.4 External I/O signal status (DIO diagnosis) .................................................................................27
14.5.5 Input device on/off .........................................................................................................................30
14.5.6 Disabling/enabling I/O devices (DIO) ..........................................................................................31
14.5.7 Input devices on/off (test operation) ............................................................................................32
14.5.8 Test operation mode ......................................................................................................................33
14.5.9 Output signal pin on/off (output signal (DO) forced output) ......................................................37
14.5.10 Alarm history ..............................................................................................................................38
14.5.11 Current alarm .............................................................................................................................39
14.5.12 Other commands .........................................................................................................................40
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