This is as basic as it gets, but has anyone have any experience with the 90 series ABB PLC's which is there "brick" model? They use AC1131 software. I was working with a KT96 model (24 in, 16 out) and could never get online. Made all the serial setting checks on both PC and PLC, tried both cables supplied, etc.. Had no problem communicating with the ABB CX553 HMI with same cable, pc and so forth. Anyone know of a setup issue, trick, or anything strange about just getting online with one of these? Could not upload, download, or anything. Just kept getting "error code #0, logging out)which the help section says that error code 0 is not an error! Thanks for any info.