Anyone ever had issues with limitations on module count with a P1-550? I have a rack with 11, and was getting an error going to RUN that none of the modules were present. ADC TS said to add P1-02AC to get to 15 modules. That worked for a couple days. I then attemped to add a 12th, and the error came back. I removed that one (back to the 11 config that was finally working), and the error will not go away. I'm current on firmware, and have tried with 4.6 and 4.7.

I've done 9 modules before on a different project (without the P1-02AC) and have never had an issue. I have also tried a different P1-550, and it does it with that also. I even changed out module #1.

Last week, I had to restart my config with 1 module, and add a couple at a time, and I was able to get it to 11 without P1-02AC. I can't do that with logic now in place. I do have 5x p1-02HSCs and 3x P1-04PWMs, but ADC TS said that should not be the issue...

I guess I could split this up and put in a P1-RX?