Does it's possible to Refit.

yes, no problem

I looked how communication is organized. 

On this photo main remout fiel module. It connects some discreat inputs/outputs and at the end of it there are two AS-I modules that work with pneumatics.

Main module is BK5120 - CANOpen interface.
I suppose that it's very easy to connect on hardware level PC to it. I can use CAN to RS232 converter.
What drivers can I use to connect linuxcnc to it? Should it be some Modbus driver (but remaid for this purposes)?
Or is it better to excange this module to ethercat module EK1100 from Beckhoff?
 

oh, there is already beckhoff inside...

you can't change bk5120 to ek1100, because this are the old KL Bus terminal series.
for ek1100 you will need complete Ethercat terminals: EL Series....

You can't interface simple to the canbus, You will need an canbus master, and would have to implement the whole protocol by yourself.

If I look at this cabinet, I have the following ideas:

-changing the BK5120 to an BK1120 (ethercat) but thats a lot of coding efford.
-Changing all Terminals to EL Series, (everything ready in linuxcnc-ethercat, -fast to setup)

Can you create an list of the order and the type names of the used terminals. The names are on the bottom (KL1104, KL2004 etc....)

What happens to the original Control? Exists Backups of the Twincat Files? IF yes implementation with BK1120 and KL Terminals could be done fast..

Control PC is stopped complitly but I didn't look it. I think I can get to hardware information of it or even possibly I can to repair old PC. But cnc machine didn't work with old control system.
I'm very glad, that you are specialist in Beckhoff, because I've never worked with this vendor.
Now I'm far away from this machine but when I will come. What files I need to look inside PC? All terminals I will look also.
I like second variant, because "codding efort" is not about me.
 

Hi,

check if the harddisk is alive. you will need the files that are in the c:\twincat\boot folder. If it is an Win CE System there is same folder structure inside the harddisk folder of the CF Card.

The best would be to have the *.tsm file (hardware configuration) and the very best to find an *.pro file (plc programm) . But if not , we can decode the files in the boot folder....

Hi,

Just for info.
In the past i retrofitted a machine like that. But only 2 z-spindles on top. I replaced everything including servo motors.
Only then you are safe with price. I hate old stuff. But if client wants to pay for new stuff its ok for me.
 

Grotius, you are 100% right. But in my region it's impossible situation to replace all devices.
I made 2 retrofits and with 2 machines I had problems with servodrives.
for 1-st - I had 3 spare servos that I used))
for 2-nd - I found company that makes retrofit of servodrives in my country. They made refurbishment - it was chipper then to buy another one.

From my experiance - first what you need to do when make retrofit - is to change cappacitors in old servodrives.

 I was near CNC machine and spoke with engineer that tried to run it. He did not give himself to work at all 100% and there is a lot of possibilities to repair old one machine. So my results for this day:- hard drive was died, but  all information from TwinCAT and neigbour folders was copied. I had it. Currently I have /TwinCAT/Plc/APSection/APSection.pro and  \TwinCAT\Boot\CurrentConfig.tsm 
 
- I took PC home, and I need to reinstall this files to new hard drive, currently Engineer stuck with licensing of that files. In the PC are present installation files and instruction how to install it. But a lot of istallation files are in zip archive locked by password.((
- On PC there is PCI board for optical Secros (Servodrive connection) and CANOpen (PLC)    

-CANOpen device has such boards:
 +CANOpen device BK5120
 +KL1114       10pcs
 +KL2134        4pcs
 +KL2114         2pcs
 +KL6201         2pcs (AS-i)
 +KL9010      -end

As for me I need to try to repair this modules because they all have files to refit. I see that all automation was made on twincat 2.6. I think, it's very powerful automation tool and as I'm automation engineer I need to study Beckhoff devices for automation
Please, db1981, give me translation to new Ethercat modules, that I could get quote for them in my country from local representative.
 

I turned on the PC and it does not see either the hard drive or my flash drive.

I think first of all I need to change PC to something newer.