Hi there,
I have successfully connected a set of drives over EtherCAT and communicated with them using a SDO telegram. However a round trip can take ~40ms even for the first drive in the chain. My use case for this would lead to a system of 18 motor drives, which would be a minimum of 720ms to message them all. I understand that Logical addressing and Raw Data Methods can reduce this time span, however I believe that this only applies to PDO objects, and the data I am trying to read is well above the 250 bytes of allowed pdo mapping of the ABB e190 Drive. I am already using Complete Access to read the entire array at once.
According to the following,
https://www.ethercat.org/pdf/ethercat_e.pdf
Multiple addressing would allow me to propagate an SDO Telegram the entire length of the system, assuming that the object address' remain the same - But I can't find any mention of this in the LabVIEW driver implementation. Likewise while I can find some mention of broadcasting - it appears obfuscated from the front end unless I'm missing something.
Is multiple addressing not available or have I missed it? Any other suggestions?
Cheers
