Ok.. here is my situation..
I need to know the project database backup file version (ACD file) of my Allen Bradley PLC..
Reason is.. if you want to open it using RSLogix5000 or now called Studio 5000.. you need to know what version of your PLC file..
Since i only have the *.ACD file - what i did was.. try open via Notepad..
It will show up as below..
In below example... the PLC database version is v20.01.00
