John Filipson

I use GX-IEC Developer and Q12 with Profibus. I have D-memories tha keep on getting cleared. I MOV avalue to themand it stays there for a couple of seconds and then the memory is cleared. They aren't adressed twice and they are Globals. The Autorefresh boxes aren't checked (Known to cause these problems) when I download the profibus-config. Any ideas?

In GX IEC-Developer under Debug , Device Edit you can right-click and insert devices and then read the value of thefromthe PLC and store it as an Excel-file. Hope this can help you. //John

We have solved it! We had arranged the bits in the correct order (they where all mixed up), so that wasn't the problem. My college sketched a graph with Dist in mm as X-axis and AI-value as Y-axis. Why did the graph bend upwards at the end and became so non-linear?? Gee it looks like a 2nd degree equation. He started solwing it to get the coefficients. And when we implemented the calculation in the code it resulted in an perfect measurement!! As I have understod it In Siemens S7 you get the value as an integer which is linear and represent the measured value. So Siemens must perform this type of calculation "inside" of their software. This isn't mentioned in any manual of course, why help a competitor, Mitsubishi. Anyway, many thanks for your help guys, now we can return some info to you! // John and Jörgen

I think the setup is OK, I'm only using the first AI at this moment. I canget values but i wouldlike to be able to set up the bitsthatshould be used for values, valueOK etc. My present setup looks like below: Many thanks for your help !