A - 13 A - 13
11.3.4 Transmission request does not make the "SD" LED blink ......................................................... 11-39
11.3.5 Read request signal does not turn ON even though the external device transmitted
a message and the "RD" LED was blinking ................................................................................ 11-40
11.3.6 The CPRTCL instruction execution is not completed although the “RD” LED blinked.............. 11-41
11.3.7 Communication error "NAK" ........................................................................................................ 11-42
11.3.8 Communication error "C/N" ......................................................................................................... 11-42
11.3.9 Communication error "P/S".......................................................................................................... 11-43
11.3.10 Communication error "PRO."..................................................................................................... 11-44
11.3.11 Communication error "SIO" ....................................................................................................... 11-45
11.3.12 Communication error "CH1 ERR." or "CH2 ERR." ................................................................... 11-46
11.3.13 Communication is intermittent ................................................................................................... 11-49
11.3.14 Undecodable data are transmitted or received......................................................................... 11-51
11.3.15 Whether the communication error is caused on the Q series C24 or external device is unclear
................................................................................................................................................... 11-52
11.3.16 Communication is not available via the modem ....................................................................... 11-53
11.3.17 Communication is not available with the ISDN sub-address.................................................... 11-54
11.3.18 Periodic transmission is not performed normally ...................................................................... 11-54
11.3.19 Condition agreement transmission is not performed normally ................................................. 11-54
11.3.20 Data cannot be received due to an interrupt program .............................................................. 11-54
11.3.21 Data cannot be written to the flash ROM .................................................................................. 11-55
11.3.22 Troubleshooting on protocol setting data reading/writing......................................................... 11-56
11.3.23 The "ERR" LED is lit................................................................................................................... 11-57
APPENDIXES APP.- 1 to APP.-63
Appendix 1 Functional Improvements of the Q Series C24 ...................................................................App.- 1
Appendix 1.1 Comparison of Q Series C24/GX Configurator-SC/GX Works2 ..................................App.- 1
Appendix 1.2 Precautions When Updating the Module from Function Version A to B......................App.- 7
Appendix 1.3 Precautions When Replacing the QJ71C24(-R2) with the QJ71C24N(-R2/R4) .........App.- 7
Appendix 2 QnA/A Series Module ...........................................................................................................App.- 8
Appendix 2.1 Functional Comparison with the Q series C24 and the QnA/A Series Modules .........App.- 8
Appendix 2.2 Using Programs Designed for the QC24 (N) and Installing the Q Series C24
into Existing Systems ....................................................................................................App.-10
Appendix 2.2.1 Using programs designed for the QC24 (N)..................................................... App.-10
Appendix 2.2.2 Installing on existing systems........................................................................... App.-11
Appendix 2.3 Using Programs Designed for the Computer Link Module and Installing
the Q Series C24 into Existing Systems......................................................................APP.-12
Appendix 2.3.1 Using programs designed for the computer link module.................................. App.-12
Appendix 2.3.2 Installing the Q series C24 into existing systems ............................................. App.-15
Appendix 3 Processing Time...................................................................................................................App.-16
Appendix 4 ASCII-Code Table ................................................................................................................App.-19
Appendix 5 External Dimensions.............................................................................................................App.-20
Appendix 6 Connection Examples When Using a Converter.................................................................App.-22
Appendix 7 Communication Support Tool (MX Component) .................................................................App.-25
Appendix 7.1 Overview of MX Component .........................................................................................App.-25
Appendix 7.2 Usage Procedure of MX Component............................................................................App.-28
Appendix 8 Example of Clear Process Program for Receive Data........................................................App.-35
Appendix 9 Program Examples for Using Q Series C24 at MELSECNET/H Remote I/O Station........App.-37
Appendix 9.1 System configuration and program conditions .............................................................App.-37
Appendix 9.2 When accessing buffer memory using sequence program..........................................App.-39
Appendix 9.3 When sending on-demand data ....................................................................................App.-40
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