Help! Need wiring diagram of Serial Cable to connect Omron CPM2A to computer

mrplc.com has alot of good info.


http://forums.mrplc.com/index.php?download=74

Confused on the Signal Ground Pin #7 or #9

bluebyu said:

mrplc.com has alot of good info.


http://forums.mrplc.com/index.php?download=74

Click to expand...

Tks for the above info. I made up a serial cable based on that and using Pin #7 in the Omron PLC side connecting to Pin #5 to the computer side. (Some other info seems to indicate it should be Pin #9 instead of Pin #7, any difference?)

However, I can not get my CX-programmer to auto detect the PLC. Am I doing something wrong here? Any help will be much appreciated.

Tks & best regards,

WT

Pin 9 on PLC should go to Pin 5 on computer.
Pin 7 was Signal Ground on the C--H product.

If pin 9 is not connected, that is probably your problem.

Also, which position is the switch in that is next to the 9 pin port?

Hope this will help.

Hi, I got it working using Pin 9 on the PLC side to Pin 5 on the computer side.

Thanks a lot.

Glad you got it to work.
Let us know if you have any other questions.