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PLW file header

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PLW file header

Postby phe » Wed Jul 05, 2017 7:57 am

Hello,

I'm using a PicoLog recorder release 5.24.8.
I need to get acceess to records, so that I read the associated help file (release PLW033-1.7 15.2.07
?).
In this file, there is paragraph which describes the PLW header:

UNS16 header_bytes; - la longueur, en octets, de cette en-tête
char signature [40]; «PicoLog for Windows»
UNS32 version;
UNS32 no_of_parameters; nb de paramètres enregistrés
UNS16 parameters [50];
UNS32 sample_no; idem no_of_samples, sauf en cas de défilement
UNS32 no_of_samples; nb d'échantillons déjà enregistrés
UNS32 max_samples;
UNS32 interval; intervalle d'échantillonnage
UNS16 interval_units; 0=fs (femtosecondes), 4=ms, 5=s, 6=mn, 7=h
UNS32 trigger_sample;
UNS16 triggered;
UNS32 first_sample;
UNS32 sample_bytes; longueur d'enregistrement de chaque échantillon
UNS32 settings_bytes; longueur du texte réglages (copie du fichier .pls)
UNS32 start_date;
UNS32 start_time;
INT32 minimum_time;
INT32 maximum_time;
char notes [200];
INT32 current_time;
UNS8 spare [78];

Thius header doesn't seems to match with the data I observe:
. "parameters" area seems to contain 250 parameters instead of 50,
. "notes" area seems to be an array of 1000 bytes instead of 200
. afetr the number of announciated record area ("no_of_samples"), I have some more record
...

Can someone confirm if the header in the documentation is correct or not ? If not, does someone know the real header structure ?

Best regards !
phe
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Re: PLW file header

Postby Hitesh » Thu Jul 06, 2017 7:53 am

Hi phe,

Can I ask to the reason for reading the header? Are you looking to extract the data into your own application?

You may wish to refer to this thread.

Regards,
Hitesh

Technical Support Engineer
Hitesh
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Re: PLW file header

Postby phe » Thu Jul 06, 2017 1:22 pm

Hello,

Thank you for your answer. Yes, I need to extract data for my own application.
The thread you point out is a very good answer to my question.

Thank you very much !

Regards,
phe
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Joined: Wed Jul 05, 2017 7:45 am


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