ION native protocol

[Anonymous user]

Hey!

I'm looking for some documentation about ION native protocol (tcp 7700). Is there any? 

Does Schneider have any kind of SDK or API to use this protocol in some language?

Thanks!

[Charles_Murison · Accepted solution]

Hello @Anonymous user ,

No, the ION protocol is propriety and does not have any documents, SDK or API.

Regards,

Charles

[Anonymous user]

Hey! Charles, thank you for your reply.

I need to debug some communication problems (data corruption) and need to know the CRC for the ION protocol.

I've tried with many algorithms but nothing works.

May you provide me this piece of information please? (PM)

I would be very grateful!!

Regards

Luis

[Charles_Murison]

Hello @Anonymous user ,

Likely even with the CRC this may not help figure out what was sent to the meter and what was returned. Are you able to capture Ethernet packets? I would assume so given your questions about CRC. You could work with Tech support to help with some of this.

Would need to provide a description of what you are trying to troubleshoot, the approximate times you think this is happening and the packet captures (Wireshark for example) of the communications. Any software/meter that gets a packet with incorrect CRC would likely reject the message from meter/software.

Regards,

Charles

[Anonymous user]

Hello Charles

Thanks for your answer.

Now I understand why I was getting no response from the meter. It was not a corruption problem but a crc one.

I need to obtain historical data from the meter (8650), exactly the same as the "load profile" report shows (by government regulation) and also be able to recover the values ​​not transferred during a communications outage.

I am trying to read the report "load profile" (total every 15m) by ethernet and I understand that the only protocol that allows it is the ION@7700. I am used to interacting with multiple protocols but in all of them I have been able to identify the crc algorithm without any problem, I don't understand why not in this one.

Please your guide to solve this problem.

Thank you!

Luis

[DanL]

The ION protocol uses the same CRC algorithm as Modbus RTU: a 16bit CRC with polynomial x¹⁶ + x¹⁵ + x² + 1 and initial seed value of 0xFFFF (aka CRC-16-ANSI or CRC-16-IBM)

https://en.wikipedia.org/wiki/Modbus#Modbus_RTU_frame_format

[Charles_Murison]

Hello @Anonymous user ,

I have not tried this with ION8650 meter lately but you may be able to also retrieve the logged data using modbus. Have a look at https://www.se.com/ca/en/download/document/70022-0124-01/, Appendix B

This would only apply to the ION8650, ION7650/7550, ION8800 meters. ION9000, ION7400 and PM8000 meters this procedure will not work.

Regards,

Charles

[felipevallejo]

Hello @Charles_Murison,

I've been exploring the document in Appendix B. I was wondering if you happen to know where I can find information on the Data Recorder module number associated with the Revenue Log for the ION 8650.

Considering your experience, do you happen to know if writing to this register (43001) involves any security considerations? Are there specific configurations or permissions I need to be mindful of to ensure a smooth write operation to this register?

Any insights or pointers you could provide would be greatly appreciated!

[Charles_Murison]

Hello @felipevallejo ,

Inside the meter is a template, this template is the different modules used in the frameworks of the meter. By default the revenue log is Data recorder 1, but if someone changed the order of data recorders then it could be something different. Changing the order is unlikely but still technically possible.

I have not used the modbus method to extract data myself other than to test that it is possible. Writing to modbus register 43001 will not affect the function of the meter.

Regards,

Charles