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dmroeder / pylogix

Read/Write data from Allen Bradley Compact/Control Logix PLC's
Apache License 2.0
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Scanning Members of UDT #125

Open AndrewStuhr opened 4 years ago

AndrewStuhr commented 4 years ago

I was reading over issue #45 : "reading a tag of type UDT". When dmroeder mentioned that there's never really been an intention to read the entire contents of a UDT, was that referring to reading the values in a UDT or the member names in the UDT (or both)?

I'm hoping to read the names (but not values) of a UDT's immediate children. Is there any way to do this without an l5x file? If not, do you know what it would take to modify pylogix to do this?

ottowayi commented 4 years ago

I'm not sure that status of reading nested structures in pylogix, but I have what you're looking for in pycomm3. It will give you both the fully nested structure of a UDT as well as allow reading of the entire UDT too (assuming no External Access = None attributes). If that functionality doesn't exist, you may be able to reference my code to get it working in pylogix as well.

AndrewStuhr commented 4 years ago

Sweet! I was able to read UDT contents with pycomm3. I'm still curious what the status is with PyLogix and/or what it would take to add this functionality.

I'm going to start a separate thread in the pycomm3 issue's section.