John Filipson Posted October 5, 2005 Report Posted October 5, 2005 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? Quote
Colin Carpenter Posted October 6, 2005 Report Posted October 6, 2005 What's an "AutoRefresh" box? Haven't noticed that one. Quote
panic mode Posted October 6, 2005 Report Posted October 6, 2005 some products can use autorefresh to transfer values to PLC memory so you don't have to use FROM instruction Quote
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