alison-gravley opened a new issue, #959: URL: https://github.com/apache/plc4x/issues/959
### What would you like to happen? PLC/Protocols: Not sure which one below is for AB PLCs, I think EIP? Specifically Logix and Compact Logix PLCs. Also Siemens (S300, 1200, and 1500) and probably OPC UA. All are over Ethernet connections. The table [here](https://plc4x.apache.org/users/protocols/index.html) seems to suggest that EIP is not supported? I would like to have a POJO for UDTs. I tried to find an example in your repo and it looks like the OPM requires the tag address to be hardcoded? We would have multiple tags of the same type. Potentially hundreds of the same type. This is the first time I have used this library and I am pretty lost. We are using Java with microservices (Spring Boot) and we would like to use open source libraries if possible. I used [PLCIO](https://www.ctiplcio.com/), which is paid, for a few years at my previous company, and it was pretty nice to use, for C at least. One of the nice utilities it had was a discovery program that scans all of the tags in the PLC and then it could spit out C style structs for any UDTs, with a special conversion string you can pass once you get the plc read part of your program. I think it can work without the conversion string, but their manual doesn't mention it. What I am trying to accomplish is this: Create POJOs of PLC structs/UDTs that are commonly used in our programs. These may be fairly nested. Similar functionality to jackson xml/json. Then, we would have our list of tags to read via polling, or subscription if supported, using the root tag name in the case of a struct, or the normal types such as BOOL, DINT, STRING, etc. We would like the UDTs to map to a registered POJO, or however you would need to do it. Example: POJO without nested UDTs. ``` package com.mycompany.devicecommunication.plc4x.UDT; import lombok.Data; @Data public class HoldStatusRequestUDT { //Do I use PlcDINT, PlcBOOL, etc type or just an int, log, etc? //Probably need some sort of Alias annotation, or make the field name exactly the same as the PLC. private boolean TRIGGER; private int sequenceId; private String barcode; } ``` List of tags of type "HoldStatusRequestUDT" that we would read from SCAN100_REQ SCAN101_REQ SCAN102_REQ  and then I would expect updates for each tag and when we read, we would be able to map those values into the POJO. Please let me know if this is already possible and maybe an example or two of how to do it. Thank you! ### Programming Languages - [X] plc4j - [ ] plc4go - [ ] plc4c - [ ] plc4net ### Protocols - [ ] AB-Ethernet - [ ] ADS /AMS - [ ] BACnet/IP - [ ] CANopen - [ ] DeltaV - [ ] DF1 - [X] EtherNet/IP - [ ] Firmata - [ ] KNXnet/IP - [ ] Modbus - [X] OPC-UA - [X] S7 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
