Had my numbers mixed PLC-2 family 1772-M8 and -M16 Pretty bad since one is about 20 feet away from me
-pete On Wed, Mar 9, 2016 at 6:20 PM, Jon Elson <el...@pico-systems.com> wrote: > On 03/09/2016 11:30 AM, Pete Lancashire wrote: > >> Before uP's many used bit slice's I'm slowly putting together a >> Westinghouse Numa-Logic 700 and 1200 setup. (BTW anyone have parts, >> software, etc ?). >> >> In my opinion Modicom was the best, did not need external cooling, A/B has >> clout thus pretty much dominated. Did you know they used core at first and >> some customers demanded it since it kept its ones and zeros when the power >> went away ? >> > As far as I know, the 7300 never used core. No sign of anything like that > in the book. They did have a big backup battery for the DRAM, I used a > couple AH 12 V Gel Cell battery. The charger for the Gel Cell ran when the > control power was off, so it was supposed to maintain the memory > indefinitely - except the memory power switch had a dirty contact and would > dump the memory every couple of weeks. > > Jon > >
