Let me summarize my tests in hope someone has an idea.

1. I have followed the instructions.
2. I am using the proper cable.
3. As far as I know.

It seems simple.

1. Set K3S CONFIG:RS232 to USB. Connect USB between computer and K3S. [CHECK]
2. Connect CBLP3Y to P3 (top+bottom) and K3S RJ-45 Serial. [CHECK]
3. The COM Port assigned and working in Step #1 no longer works.

4. Repeat step #2, only connecting the lower connection to the P3. No joy.
5. Repeat step #2, only connecting the upper connection to the P3. No joy.
6. Repeat step #2, only connecting the RJ-45 and nothing on the P3. COM for #1 works.

7. When I use a PC-to-K3S USB and a PC-to-P3 USB those conenctions are fine, but the CBLP3Y is an issue.

Is there some magic setting I'm missing?

73, Byron

On 09/25/2015 09:29 PM, Byron Peebles wrote:
I have had the K3S, KAT500 and KPA500 connected and configured.
All units are connected to the computer via USB so I can use the appropriate Utility.

Now, when I try to connect the P3 to the K3S there is this behavior. I can only use the USB *or* the RJ45 serial. Once I connect to the RJ-45 serial, the USB is disconnected at the K3S and I lose access to the COM port(s).

I am guessing there is no value to the RJ-45 port once I decide to use USB, and I should use the USB-DB9 connector to connect the P3 to my PC for the P3 Utility.

I thought I had seen something where the PC connected through the K3S or P3 to the otyher, but I can't find that documented so I think it's recovered childhood memory.

I

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