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OpenEtherCATsociety / SOEM

Simple Open Source EtherCAT Master
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no slaves found error but slaves can be found in TwinCAT #715

Open ljin1 opened 1 year ago

ljin1 commented 1 year ago

Hi,

I am running into an error saying that no slaves are found. However, when I use TwinCAT to search for my devices the slaves can be found. I was wondering why the SOEM library is unable to find the slaves. The device that I have attached to my source PC is a Beckhoff CX 5130 embedded PC, in which there are slaves attached to the embedded PC.

The below are images of the error and the wireshark log

wireshark log error

ArthurKetels commented 1 year ago

It looks like you try to run SOEM under windows and TwinCAT on the same computer. This does not always work because TwinCAT modifies the NIC driver and SOEM will not see any returned packages. Please try on an other computer (either windows or Linux).

ljin1 commented 1 year ago

Ok thanks for the information!

So I tried connecting the devices directly to my source computer and it's able to identify the slaves. But now I have another error saying that the slaves are unable to reach OP state and there's a warning saying that the Nr of Bytes in input TxPdo are more then transmitted to slaves. What does this mean and how would I fix this error? Also another thing that I noticed is that the name of Slave 2 matches the name displayed in TwinCAT, however; the name of Slave 1 does not match the name displayed in TwinCAT for that device. Does this have anything to do with the error too?

[image: image.png]

On Tue, Jun 20, 2023 at 6:18 AM ArthurKetels @.***> wrote:

It looks like you try to run SOEM under windows and TwinCAT on the same computer. This does not always work because TwinCAT modifies the NIC driver and SOEM will not see any returned packages. Please try on an other computer (either windows or Linux).

— Reply to this email directly, view it on GitHub https://github.com/OpenEtherCATsociety/SOEM/issues/715#issuecomment-1598504811, or unsubscribe https://github.com/notifications/unsubscribe-auth/AP22UXCCTSEQAELI6EPJKE3XMF2GLANCNFSM6AAAAAAZMFMN2E . You are receiving this because you authored the thread.Message ID: @.***>

ArthurKetels commented 1 year ago

You do not provide enough information for me to say anything about your set-up.