APPENDIX
Appendix 2 QnA/A Series Module
This section explains a comparison of the functions of the Q series C24 and QnA/A series modules, and explains how to utilize programs created for A series modules as well as how to install the Q series C24 into the existing system.
QnA/A modules refer to the following products.
Model name | Product name |
QC24N | AJ71QC24N |
QC24 | AJ71QC24 |
UC24, | AJ71UC24, A1SJ71UC24 |
Appendix 2.1 Functional Comparison with the Q series C24 and the QnA/A Series Modules
The following shows a functional comparison between the Q series C24 and the QnA/A series modules.
The 
symbol in the model name columns indicates that the corresponding functions are compatible between the applicable models (for more information, see the manual for each module).
Indicates functions that have been added to or modified from the QnA/A series modules.
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| Q series C24 | QC24N |
| QC24 | UC24 | ||||||||||
Communication using MC protocol |
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| Communication in QnA compatible 3C frame |
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| Communication in QnA compatible 4C frame | Communication |
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| Communication in QnA compatible 2C frame | with ASCII code |
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| Communication in A compatible 1C frame |
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| Communication in QnA compatible 4C frame | Communication |
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| with binary code |
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| Read/write of QCPU device memory |
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| Excluding multiple block batch read/write. |
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| Accessing other stations (via network/data link) |
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| Transmission from the PLC CPU | Arbitrary data |
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| Using user frame |
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| Communication with m:n connection between the PLC CPU and |
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Communication using non procedure protocol |
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| Transmitted/received with arbitrary format |
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| Transmitted/received with user frame |
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| Transmitted/received with |
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| Transmitted/received with transparent code designation |
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Communication using bidirectional protocol |
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| Transmitted/received with arbitrary format |
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| Transmitted/received with transparent code designation |
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App. - 6 | App. - 6 |