omron cqm1 getting online trouble

srummel

Member
Join Date
Jul 2011
Location
TN
Posts
17
trying to get online with cqm1 cpu21 keeps getting failed to connect message. anyone have any ideas. I am using usb to serial converter to use the rs232 port
 
The RS232 port is not standard. you will need a special cable between the converter and the PLC RS232 port.
it is also not uncommon to have trouble with USB/232 converters. Many here recommend Keyspan but I have never used them. I use the Omron one, it is not inexpensive but has worked with everything I have thrown at it.
Here is a link to Omron cables
http://forums.mrplc.com/index.php?app=downloads&showfile=349
 
As above - check your cable - Omron serial ports are not standard.
For example pin 5 is a 5VDC supply for the connection of bluetooth serial ports - that is not standard.
 

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