FX3U-ENET-L USER'S MANUAL - Automation Systems and Controls

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9WHEN COMMUNICATING DATA USING THE MC PROTOCOLMELSEC-F9.5 Loopback TestA loopback test checks whether or not the communication function between anexternal device and the Ethernet module operates normally. The examples show thecontrol procedure using this function.POINT(1) A loopback test checks whether or not the connection between the externaldevice and the Ethernet module is correct and that the data communicationfunction operates properly when the FX3U-ENET-L is started up or when aproblem occurs.(2) Use the following data for loopback tests.Send the head part first.• When communicating in binary codeMaximum of 254 bytes of numerical values (00 to FFH).• When communicating in ASCII codeMaximum of 254 single-byte characters ("0" to "9", "A" to "F").9.5.1 Loopback test (command: 16)[Control procedure]The examples shown in this section explain the control procedure for an externaldevice performing a loopback test with the Ethernet unit.The order and content of data items of the areas marked by " " shown in the controlprocedure diagram differ depending on the module used as well as the frame andformat used for communication.See the detailed information described in Subsection 9.1.2.(1) Performing a loopback test while communicating in binary codeDesignated byte length+5bytes(Data name)External devicesideSubcommandPC No.MonitoringtimerData length(1 to 254 bytes)Head send dataSecond send dataLast send data(Example)LH16 H FFH 0A H 00 H(Data name)PLC sideSubcommandComplete codeData length(1 to 254 bytes)Head send dataSecond send dataLast send data(Example)96 H 00 HDesignated byte length+3bytes9 - 399 - 39
9WHEN COMMUNICATING DATA USING THE MC PROTOCOLMELSEC-F(2) Performing a loopback test while communicating in ASCII code(Designated byte length 2)+10bytes(Data name)External devicesideSubcommandPC No.MonitoringtimerData length(1 to 254 bytes)Head send dataSecond send dataLast send data(Example)16HFLFH00 0LA31H 36H 46 H 46 H 30 H 30 H 30 H 41 HHLHLHLHL(Data name)PLC sideSubcommandComplete codeData length(1 to 254 bytes)Head send dataSecond send dataLast send data(Example)96H0L039H 36 H 30 H 30 HHLHLHLHL(Designated byte length 2)+6bytesPOINTThe number of the loopback data transmitted by an external device is returned tothe external device it is.9 - 409 - 40
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FX3U-ENET-LUSER'S MANUAL
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[Wiring Instructions]DANGERBefore m
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CONTENTSSAFETY PRECAUTIONS ........
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8 COMMUNICATION USING MC PROTOCOL 8
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About ManualsThis manual explains t
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Caution to conform with EC Directiv
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(3) Connection between the Ethernet
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1OVERVIEWMELSEC-F1OVERVIEWThis manu
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1OVERVIEWMELSEC-F1.2 Features of th
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1OVERVIEWMELSEC-F(4) Connecting FX
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1OVERVIEWMELSEC-F1.3 Software Confi
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1OVERVIEWMELSEC-F3) PSH (Push Flag)
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2SYSTEM CONFIGURATIONSMELSEC-F2.2 D
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3SPECIFICATIONSMELSEC-F3 SPECIFICAT
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3SPECIFICATIONSMELSEC-F3.2 Data Cod
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3SPECIFICATIONSMELSEC-F3.3 Relation
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3SPECIFICATIONSMELSEC-F3.5 List of
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3SPECIFICATIONSMELSEC-F(2) Assignme
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3SPECIFICATIONSMELSEC-F(b) Communic
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3SPECIFICATIONSMELSEC-F(c) Communic
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3SPECIFICATIONSMELSEC-F(d) Error lo
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3SPECIFICATIONSMELSEC-F(e) Router r
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3SPECIFICATIONSMELSEC-F(h) Mail sen
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3SPECIFICATIONSMELSEC-F(i) Connecti
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3SPECIFICATIONSMELSEC-FBFM numberDe
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4SETTINGS AND PROCEDURES PRIOR TO O
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5COMMUNICATION PROCEDUREMELSEC-F5 C
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5COMMUNICATION PROCEDUREMELSEC-F(1)
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5COMMUNICATION PROCEDUREMELSEC-FPOI
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5COMMUNICATION PROCEDUREMELSEC-F(b)
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6FIXED BUFFER COMMUNICATION (WITH T
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11TROUBLESHOOTINGMELSEC-F1)Is the I
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APPENDIXMELSEC-FAPPENDIXAppendix 1
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APPENDIXMELSEC-F[Calculation exampl
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APPENDIXMELSEC-FAppendix 4 Program
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APPENDIXMELSEC-F(3) FX Configurator
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APPENDIXMELSEC-F/ *****************
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APPENDIXMELSEC-FCloseflag=FLAG_ON;/
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APPENDIXMELSEC-F}case ERROR_BIND:pr
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APPENDIXMELSEC-F(4) Window example
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APPENDIXMELSEC-FDim RxResponse As S
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APPENDIXMELSEC-FAppendix 5 Differen
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APPENDIXMELSEC-FRecording sheet 2[B
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APPENDIXMELSEC-FRecording sheet 4[B
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APPENDIXMELSEC-FAppendix 8 Versioin
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WarrantyPlease confirm the followin
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FX3U-ENET-LUSER’S MANUALHEAD OFFI
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FX3U-ENET-L USER'S MANUAL - Automation Systems and Controls

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