CNC based on ASDA-A2-M controllers

Mesa 7i96S should be a nice start.
eusurplus.com/index.php?route=product/pr...62_71&product_id=159

No PLC, LinuxCNC has it's own PLC.
Also PLC are not used for motion control on CNC, just some automated functionality, like tool changes or pallet changes, etc.
Unless you sit down and write a driver for LinuxCNC and CANOpen, there is no such thing for now, that i know off.
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Rant:
CAN has been around for over 20 years, it was and is Car Area Network, NOT "Controler area network" as the internet insists (1 that is a dumb name for a protocol that makes no sense ... to long, and 2 it was made specifically to work on cars with lots and lots of electrical noise).
It was never intended for CNC machines, just have a look at the issues 3D printers using it have.
Maybe something has changed, but i doubt it...

Ahoj pane, jak se mate?

kubajed wrote:

Do I need anything else hardware-wise? Just the Mesa card and PC?

Yes.

kubajed wrote:

Would a Raspberry Pi work in this setup?

Yes it would, but i would get a used PC instead, cheaper and less fuss.

kubajed wrote:

To form a full closed loop, would you connect the linear encoder to the servo drive or Mesa card?

The drives you have will need the encoder wired to them to work in position mode, but most have also encoder outputs that can be used to close the loop in LinuxCNC.

kubajed wrote:

I'm from Poland

Djakuju bardzo!
I can read and understand a bit of Polish, but speaking tends to to towards Czech very fast.