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libplctag / libplctag.NET

A .NET wrapper for libplctag.
https://libplctag.github.io/
Mozilla Public License 2.0
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PowerFlex 753 communication over Ethernet. Is it possible? #349

Closed gsp-dce closed 11 months ago

gsp-dce commented 1 year ago

I'm using libplctag.NET with some AB CompactLogix and it is working perfectly!

But what about AB Drives PowerFlex 753 and PowerFlex 525 over Ethernet?

Is it possible to use this same lib (maybe with some minor changes)?

raentzmi commented 1 year ago

I would doubt it. These drives do not expose a tag model in the same way a AB CompactLogix does. What may work (will leave that up to the community) is what is called CIA (Class Instance Attribute). Even if this CIA would work you will only get slower data not high speed current etc as I suspect you're looking for.

It would be a very valuable thing to have in a library like this - and would be valuable for all of CIP devices, not just drives.

On Fri, Aug 25, 2023 at 6:51 AM GSP @.***> wrote:

I'm using libplctag.NET with some AB CompactLogix and it is working perfectly!

But what about AB Drives PowerFlex 753 and PowerFlex 525 over Ethernet?

Is it possible to use this same lib (maybe with some minor changes)?

— Reply to this email directly, view it on GitHub https://github.com/libplctag/libplctag.NET/issues/349, or unsubscribe https://github.com/notifications/unsubscribe-auth/AL4TWK7MAJ6GGFDYH4VEHGLXXCGU7ANCNFSM6AAAAAA36MU4MA . You are receiving this because you are subscribed to this thread.Message ID: @.***>

timyhac commented 1 year ago

libplctag does allow for "raw" tags. This Pull Request contains an example that shows what it would look like to make use of that feature. I'm not sure if that is enough to interface with the drives.

There have been some similar questions asked in the past:

raentzmi commented 1 year ago

I looked at the similar questions and nothing pops out as a solution.

Rockwell has released a new firmware for the 755T (v12) that has some symbols and templates that look like controller UDT's. What this will do is allow data collection directly from the drive. I don't know if these will be presented to CIP as a UDT - they do show up in LiveData which makes me think that maybe this will work.

Now for the downside - this will be probably implemented on newer firmware and new drives so older drives may never get the new firmware. For these older drives there is a CIP proxy that describes the CIA addresses for relevant items in the drive.

This is why what is really needed is a CIA EtherNet/IP component - then you could get to any parameter in the drive - once again slower than CIP direct but still gets data.

Maybe next year I can look deeper into this -right now I don't have the time...

Where I would start is reading the CIP Identity object - this contains pretty much static data about the device ...

On Fri, Aug 25, 2023 at 7:26 PM timyhac @.***> wrote:

libplctag does allow for "raw" tags. This Pull Request https://github.com/libplctag/libplctag.NET/pull/212/files#diff-577efc91c1d7667debebeaba0ea20e783d6dfa42140e2cc790b03d45450172c3 contains an example that shows what it would look like to make use of that feature. I'm not sure if that is enough to interface with the drives.

There have been some similar questions asked in the past:

— Reply to this email directly, view it on GitHub https://github.com/libplctag/libplctag.NET/issues/349#issuecomment-1694066345, or unsubscribe https://github.com/notifications/unsubscribe-auth/AL4TWK75JSRNJSCFLSIFMT3XXE7DPANCNFSM6AAAAAA36MU4MA . You are receiving this because you commented.Message ID: @.***>

timyhac commented 11 months ago

Hi @gsp-dce - thanks for the question, I trust you found an answer to your question!

@raentzmi - thanks for the extra information!