MF4 merge DIAdem 2022

[gabor.beke.avlhu]

Hello guys,

Is there a way to merge two MF4 INCA measurements to one in DIAdem 2022?

60 min meas. + 35 mn meas = 95 min meas. The two measurements should come after one other in the merged file.

See attachment. I want them to be one long measurement.

Thanks!

Greetings,

Gábor

[Walter_Rick]

Hi Gábor,

I general, you have two option to append or concatenate files. One directly while loading the files and the other one within DIAdem as ANALYSIS function. The DIAdem help gives detailed information about this.

But as far as I know, INCA files are very long per se, and you may run into either time-consuming data processing or limitations on maximum channel length. So, it could make sense to reduce the data while loading them. For this you can use this function.

Greetings

Walter

[gsklyr]

Curious, how do you load the MF4 into DIAdem?  I convert MF4 to asci and then use dbc files in the DIAdem bus log converter to generate tdms, then merge into one tdms (so all MF4s from one test are merged).  I have a script that automates all the conversions and everything else.

[Walter_Rick]

Hi gsklyr,

You must differ between time based and data packet based MDF4 data. Time base data you can load with MDF4 DataPlugin and for data packet based (CAN) data you can use the Bus Log Converter.

Greetings

Walter

[gsklyr]

I do not know the difference.  Do you know of a good recourse to learn more about the differences.  I guess I am using packet based MDF4 because I am using dbc files and the bus log converter (or a custom written library with dbc to work with it outside DIAdem)

[Walter_Rick]

Hi gsklyr,

I am not a specialist for CAN data but here is a link which explains it quite well.

https://en.wikipedia.org/wiki/CAN_bus

Because a CAN signal is a frame (or packet) of IDs, the measured value, and other information sent by any sensor at any point in time, it is necessary to convert and sort them by sensor. This is done by the DIAdem Bus Log Converter.

If you measure data from a sensor you acquire a sequence of time discrete values which are already sorted and stored typically as an array.

Greetings

Walter