EtherCat I/O

I have no idea about anything you are talking about.
I just type ethercat sdos and ethercat pdos and write the xml file we need.

We did work out the deiwu settings and is in my git
github.com/rodw-au/linuxcnc-cia402/blob/...hercat-conf.xml#L158
Note this is slave 3 in my config. That may be different for you.
Some devices, there are existing drivers in the repo I linked earlier but this one we needed to use the generic driver and define its pins. Take the time to read the docs in that repo.

Thanks for your help, I guess I could create a xml file in the format that I need though it is a little more difficult and I guess I'll find software to do it based on the info you've provided. If it works for you then the indexes must be correct.

I really hope the vendor gets back to me, as much as I'm a bit interested, I don't really want to spend time on this tbh. I hope all the info needed is in the file you have provided otherwise buying a different device would probably be wiser rather than trying to guess some default values added by the software you use which may or may not be in the documentation which is probably aimed at the user level.

Maybe I could ask how you arrived at the addresses for the pdo and sdo index and sub-index?

Some time you might be interested to see what the normal standards are and how they are used with Twincat and Codesys, both can run g-code and twincat is very advanced in that area.

thanks

Ethercatuser wrote:

Thanks for your help, I guess I could create a xml file in the format that I need though it is a little more difficult and I guess I'll find software to do it based on the info you've provided. If it works for you then the indexes must be correct.

I really hope the vendor gets back to me, as much as I'm a bit interested, I don't really want to spend time on this tbh. I hope all the info needed is in the file you have provided otherwise buying a different device would probably be wiser rather than trying to guess some default values added by the software you use which may or may not be in the documentation which is probably aimed at the user level.

Maybe I could ask how you arrived at the addresses for the pdo and sdo index and sub-index?

Some time you might be interested to see what the normal standards are and how they are used with Twincat and Codesys, both can run g-code and twincat is very advanced in that area.

thanks

The addresses I used came from the commands I quoted.
Yes what I did will work.
If you want to make it easier, use Beckhoff hardware as its well supported via single line entriesd in the xml file.

We don't need another motion controller that interprets gcode. We use Linuxcnc for that.
I have no interest in Windows anymore. I use Linux for everything now.
 

Well I'm not fan of windows either but I suppose you'll be happy to hear that the runtime of codesys can be executed on linux and twincat on bsd. I use the preempt-rt patch and a dedicated core to run ethercat. It's surprisingly good 1-7us jitter most of the time and nearly always under 100us.

I'm still talking with the vendor and realising that nobody seems to know that ethercat is a standard and has rules.

Doing stuff like this creates a mess in the long run. Ethercat is a very good standard and I heard good things about linuxcnc but this makes it look bad tbh.

Now vendors are selling products that don't support the standard it would seem. I think this started in Asia because others appear to be doing it for factory automation there.

There's a reason linux is good and ignoring standards isn't it

I'm not convinced that codesys or twincat is a standard.
But CIA402 over ethercat is.
When I attended a seminar where Martin Rosten, the head of the Ethercat Technology Group spoke when he was in Australia, the Ethercat standard he described was all around the TCP packet structure and its handling.