Logging backfill to HMI or CHMI

Hello,

Let's say that there is an AC500 connected to HMI or Compact HMI and the PLC is logging data. In case there is a disconnection between the PLC and the HMI/CHMI, is there a way to back fill the logged data during the disconnection to the logging history of the HMI/CHMI?

Thanks,
Osama Ayoub

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osama Rank: 506

Asked 7 months ago

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With Basic History as your historian, yes!

Prepare a .csv file (for examples of formatting, make a small export first!) and import it. The Administrate object level security permission is required on the objects you are modifying history on.

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by osama Rank: 506 on 10/1/2020 5:04:28 AM | Like (0) | Report

Would this import the logged data from the PLC to CHMI? Is the only option is to export? Can I read the logged data on the trends on the SCADA for example?

by Stefan Stromqvist AKS expert

Rank: 1 on 10/1/2020 6:01:17 AM | Like (0) | Report

Yes, you can import *any* correctly formatted data; just make sure what you intend to import is formatted in a way Basic History can import.

With Max Time enabled, Basic History may already have created "Extrapolated" values (flat line keeping last known value + status) which you will have to remove or overwrite (but then timestamps must match exactly).

by osama Rank: 506 on 10/1/2020 6:57:42 AM | Like (0) | Report

Thank you! One last question though, I tried to add log config aspect just to check it out, but I think I am in the wrong place.
What I did is that I added a log configuration aspect under the PLC inside the control structure, am I in the right place? Is this available in CHMI and 800XA 5.1?

by osama Rank: 506 on 10/1/2020 7:01:25 AM | Like (0) | Report

Never mind I found what I am looking for, thank you so much!

by osama Rank: 506 on 10/1/2020 7:06:00 AM | Like (0) | Report

And is there a way to make this process automatic? or I should manually import the data that are lost during a disconnection

by Stefan Stromqvist AKS expert

Rank: 1 on 10/1/2020 9:57:38 PM | Like (0) | Report

No automation - this is like a last resort to get a signal recovered.

Normally, you have redundant Basic History service providers, then A may copy from B or vice versa after a computer downtime, etc.

Few PLC in ABB can log data without HMI connected. 800xA for Advant Master is one exception, here the recovery of lost data is automated.

by denis.sokhatskiy@ru. Rank: 118 on 10/12/2020 10:40:29 PM | Like (0) | Report

Hi,
You can to try use IEC-60870-5-104.
I have made testing system:
Use IEC-60870-5-104 OPC server and connect 800xA System to it.
Have stored AC500 historical data on CF, and after connection reestablished AC500 read data from CF and sent it to IEC-60870-5-104 OPC Server with the timestamp. 800xA OPC Client read data with the real timestamp and Basic History Service can add to 800xA log files.

Yiu can find more information about it in:
PS563-Water Package: LogData Library - Webinar

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Stefan Stromqvist AKS expert

Rank: 1

Answered 7 months ago

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Logging backfill to HMI or CHMI

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