Problems with D-memories that get cleared

[John Filipson 0]

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?

[panic mode 246]

post your file(s)

[Colin Carpenter 10]

What's an "AutoRefresh" box? Haven't noticed that one.

[panic mode 246]

some products can use autorefresh to transfer values to PLC memory so you don't have to use FROM instruction