Data recorder indexing and log export issues

[ausfrosty1]

Hi All,

I am using the PM8000 to capture data (Frequency and kW) pre and post a frequency event. To do this I am using a setpoint module with a limit (for instance 49.97) that triggers a data recorder to record 5s pre event and 10s post event.

When the record is complete a LogExport module sends the data (an xml) to an email server.

As per the attached I am getting issues whereby the data/indexing in the data recorder is somehow not chronological.

Referring to the attached if you scroll to the bottom of the file the first entry is DR pos =32 and the seconds of the timestamp is 12. Scrolling up through records you will notice that at DRpos =36 the time has suddenly jumped out of chronological order.

It turns out the records DR pos 32-35 should come after DR pos 47 to make this data set chronological.

I am wondering how I could have potentially got the data recorder indexing in this state and or how to get it back to chronological order?

The settings in the Data Recorder are:

Depth = 16

RecordMode = Circular

Insert Outage Records = No

Checksum = Disabled

Buffer Depth = 128

Timestamp Mode = Record Pulse

Pre Trigger Records = 5

Post Trigger Records = 10

Within the LogExport Module the only setting I believ of note is:

Max Send Records = 16

[ausfrosty1]

File attached...

[Charles_Murison · Accepted solution]

Hello @ausfrosty1,

There is no setting in the meter that can force the meter to save data in a specific order. When using pre-trigger and post-trigger logging, you can't rely on the timestamps monotonically increasing with the record ID anymore. You have to use the timestamps to order the data.

Regards,

Charles