Hey folks, here's a way to avoid RS-232 DNC with a Fanuc16/18i control using an ATA card. This runs as fast as machine memory. We call it the "Poor Man's Dataserver" So for less than $100 you can get like 4MB program storage as opposed to spending thousands. The only real draw back is the ATA card will stick out of the operator panel and you have to keep it in the slot.   Enjoy,   ATA DNC, Sub-program Call, Fanuc 16/18i controls   Parameter Settings: #138.7 = 1   DNC operation