mrhieu
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I have been searching for pinout for OMRON COM1A peripheral port. All the threads does not seem to have links to the PDF files. Would appreciate if you can provide the file for the pinout.
Many thanks in advance.
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http://forums.mrplc.com/index.php?/topic/24800-pinout-of-cpm1a-peripheral-port/
This may help you out.
Regards,
Garry -
Tks Garry for the reply.
I am new to PLC and trying to learn how to work with PLC. I have an old CPM1A which I have taken apart to check the pinout but was not successful with communicating with the device. From the discussion you suggested one of the poster mention pins 3,5,7 and 10. Pins 3 and 5 seems like inputs and 7 is an output with 10 being ground. But I am not sure which is txd and rxd. I have tried to use USB TTL serial converter to connect to the CPM1A without success. I have also inverted the txd rxd signal but still unable to connect.
I have read many similar posting on mrplc site. However, all the links are no clickable. I have also tried to copy the links but they end up in file not found. That is the reason why I posted this help message.
Maybe the peripheral adaptor PDF would be helpful but I am not able to get a working link to that file.
Tks again for the reply.
Eng Chee
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