I am looking into how to connect/backup the existing programming on some legacy PLC's.
I have been trying to find the information on this site, which is awesome! But I feel I am getting lost in all the different software/PLC's types.
As I understand it, we have a Melsec-A or A2AScpu. Now there is what appears to be a pin cable when you open the swivel door on the PLC that would allow you to connect it to a PC.
Where I am getting lost is "do I need a specific cable for this, I know some pin cables will have the wiring line up differently per the pins" and or "what software would work best to allow me to take a current backup of the existing programming on the PLC."
Please understand I am new to PLC's. But I am willing to learn, right now I am thinking about using some older PLC's we have that are not in use to start with so I can learn but I just feel a little overwhelmed with all the differences in both PLC versions and the software you can use. I also think if I can lock in the backup/restore process i will always be in a position to revert back should (more than likely) I make any mistakes.
Any help with pointing me a good place to start for the specific PLC I am referring to would be really appreciated.
