BLACK BOX PLC - a ghost device

[koniaris]

I have a ghost device, a PLC of, i think, italian origin and a bit outdated (1997/98 or 99). It is a 9 card system with standard following layout :

-Power supply,
-cpu board with a sticker (052m04 - something of a serial part but i`m not sure),
-graphicd card/keyboard connected to a "vdm 2000" crt monochrome display (part number/code - 056m)
and a some input output cards(0271m01, 087m01, 079m01 etc.).


The cpu board has a zilog z84c 0008 processor paired with a z84c 4008 I/O and a z84c 3008 4-channel timer/counter, with a main program (i believe) stored in a m27c256 - 12f1 EPROM.

It also has a smaller board on top with two SRAM 32 Kb chips, and a few peripherals pinned about...
The mark on the rack says SRM 330

I`ve been browsing the net for the past 2 weeks every single day and wasn`t able to dig out anything - which i find to be most peculiar.
Any thoughts or suggestions are most welcome and i`d really appreciate your help on this one.

Koniaris

[support]

It is probably just a microprocessor board with memory and control programs. This is probably a custom programmed controller for a specific application (just like a control card in your washing machine).

[koniaris]

yep...probably....but i`ve seen 4 PLC`s in 4 similar machines that were all identical, had the same layout, architecture, same racks, etc..
The thing is that the it was custom made for a company that assembles punching machines, and served as a CNC controller. It was also connected to siemens s7-300 system...and i`m really curious to find out which manifacturer could`ve designed it...
I could post a photo of it, but i don`t see any attachment options...