S7 telegram split

Hello everyone

I'm pretty new to labview an i have have a question about a stream I get of a s7 simantic.

the data flow looks like this

#SPSDATA #26 | ID = SIMATIC1 | DB295. DBB2 = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 #SPSDATA #26 |

ID = SIMATIC1 | DB295. DBB2 = 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 #SPSDATA #26 | ID = SIMATIC1 |

DB295. DBB2 = 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,.

Since it is a tcp connection I get packages and get 30 bytes per iteration, for example, converting them into a string, an analysis of the chain.

I wonder what is the best way to be sure to have at least a telegram to complete

#SPSDATA #26 | ID = SIMATIC1 | DB295. DBB2 = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

 

because I go to an arbitrary point where I can get

#SPSDATA 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0#26 | ID = SIMATIC1 | DB295. DBB2 = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,.

 

in the first place, which means that I have to cut everything before the first telegram valid and then wait for the rest of the ip packet or if it is lost

for the following telegram.

 

I tried to use some sort of patternmatching, as the structure is always the same, but it did not work.

Once I got to the telegram, the treatment is not really a problem but I'm not sure of that VI would suite better for in this case!

 

Maybe someone has a tip how to fix this elegant in labview.

Thank you andy

 

 

Hi Andreas-Zeiner,

Please go through "MatchPattern" vi and vi "Match phrase" regular in the palette of the chain.

Kind regards

Srikrishna.J

Tags: NI Software

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