Eeproms are still very much in use.
Ah, eproms, theyve caused such confusion at times, despite the fact they are in simple terms, one use pieces of programming, it will only do EXACTLY what its been told to do.
Working in Cyprus on our weighing equipment, controlled by a series of PCBs with eproms.
I arrived there to be told it wasnt working....went through all the usual checks, some functions were'nt even there !!! Put some boards in that i always carried, it now works, back to the original board....i see the eproms been changed, it turned out they'd got the Greek agents in to do some work, they'd fitted Greek language eproms, make it simpler for them...but impossible for me.
At the same time, it occured to me the eproms were'nt for that exact model of weigher, thats why they wouldnt give certain outputs. The Greek agents didnt have the in depth knowledge to know that.
So i ordered the correct ones via the UK agents, they arrived within two days, fitted...all outputs/functions now working.
BUT...over the next few days, i couldnt get the weigher output over 40 packs per minute, it should be 50.
I tried everything, different programs on the weigher, adjusted infeeds, this that and everything, i couldnt get it over 40PPM.
Left Cyprus my eproms, brought back the Greek ones, fitted them to our machines.....only 40 PPM ???
Phoned the UK agents to contact Spain, the manufacturers and ask if there was anything different about those eproms......Spain came back...'oh yes, they are 40 packs per minute maximum....if you want 50, no problem, we just didnt realise
...we'll send you some out.'
It can go so wrong, so easily...even with something that has one purpose only.