Glad to hear you got the PLC portion going, I had some issues with reading data from my VFD for the spindle, seems Mach would read all integers as signed, and my VFD was using some unsigned such as frequency 0-40,000 for for 0-400hz. so when reading that into Mach, anything over 32767 would turn into a negative value, anyway long story short, worked with tech support and they had their programmer add the ability to set the word as unsigned, its now working fine, and in the prerelease FTP site, along with the scan rate denominator to change scan rate for each topic
Bob