Mitsubishi MELSEC LJ71C24, User Manual

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A - 12 A - 12
6.3.4 Precautions when transferring data using RS-422/485 circuit ....................................................... 6-16
6.3.5 Enabling or disabling echo back of the RS-422/485 interface........................................................ 6-19
6.4 Individual Station Test............................................................................................................................. 6-21
6.4.1 ROM/RAM/switch test...................................................................................................................... 6-22
6.4.2 Self-loopback test............................................................................................................................. 6-25
6.5 Loopback Test......................................................................................................................................... 6-28
7 SETTINGS FOR THE C24
7.1 Adding the C24 to Projects ..................................................................................................................... 7- 2
7.2 List of Setting Items for C24 ................................................................................................................... 7- 3
7.3 Switch Setting.......................................................................................................................................... 7-11
7.3.1 Transmission Setting........................................................................................................................ 7-12
7.3.2 Communication rate setting ............................................................................................................. 7-14
7.3.3 Communication protocol setting ...................................................................................................... 7-15
7.3.4 Station number setting ..................................................................................................................... 7-16
7.3.5 Setting and data flow in linked operation......................................................................................... 7-17
7.3.6 Precautions....................................................................................................................................... 7-19
7.4 Various Parameter Settings and Writing to the Flash ROM.................................................................. 7-20
7.4.1 Parameter setting............................................................................................................................. 7-21
7.4.2 Writing to the flash ROM.................................................................................................................. 7-23
7.5 Auto Refresh ........................................................................................................................................... 7-25
7.5.1 Setting method for auto refresh ....................................................................................................... 7-26
7.6 Intelligent Function Module Interrupt Pointer Setting............................................................................. 7-27
7.7 Monitor/Test ............................................................................................................................................ 7-29
8 DATA COMMUNICATION USING THE MC PROTOCOL
8.1 Data Communication .............................................................................................................................. 8- 2
8.1.1 Formats and applications of the data communication frames........................................................ 8- 2
8.1.2 MC protocol system setting ............................................................................................................. 8- 3
8.1.3 Support for the LCPU remote password function ........................................................................... 8- 4
8.2 Utilizing the MX Component ................................................................................................................... 8- 5
9 DATA COMMUNICATION USING THE PREDEFINED PROTOCOL
9.1 Data Communication Procedure ............................................................................................................ 9- 3
9.2 Communication Type of Protocols ......................................................................................................... 9- 6
9.3 Packet Elements ..................................................................................................................................... 9- 7
9.4 Executing Condition of Predefined Protocol Communication................................................................ 9-27
9.5 Programming Example ........................................................................................................................... 9-31
9.5.1 System configuration/wiring example.............................................................................................. 9-31
9.5.2 Communication data ........................................................................................................................ 9-32
9.5.3 Communication settings................................................................................................................... 9-33
10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
10.1 Data Reception from the External Device.......................................................................................... 10- 2
10.1.1 Receiving methods....................................................................................................................... 10- 2
10.1.2 The receive area and the received data list ................................................................................ 10- 6