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Software method
If all you want to do is get one variable at a time you can do it all in software. In the PBASIC code you can control the robot feedback lights on the Operator Interface. You can read at least 8 of the lights through the dashborad port, so you can break your byte in PBASIC into 8 bits, and piece it back together on the computer, if using your own dashboard recorder. We have done this many times.
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