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hi sir,
i have CQM1H CPU 51 PLC.still it not communicate with the system.I have cx programmer version v 9.5.
using cables: CN 226-USB CIF02 Combination.
When i connect auto online,it not showing this plc name.Only showing like c series,cj series, like.
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http://industrial.omron.com.br/uploads/arquivos/Datasheet-CQM1H.pdf
The cable that you are using is not listed in the datasheet for the controller.I believe that you have the wrong cable.
https://www.lammertbies.nl/comm/cable/plc-omron.html
The above link will give you the RS232 pinout.
I have had success communicating using the USB port of a computer using the Ugreen USB to RS232 cable.
http://www.ugreen.com.cn/product-681-en.htmlHope this helps you out.
Regards,
Garry
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