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STM slowed down

Hi.

I developped an RT project to read data from scan engine using cRIO9074 device, as in attached picture.

The high priority loop, running on RT target, querys the scan engine and perform an average process on data. The CPU load is about 45%.

The low priority loop send data to host computer by using the NI STM protocoll.

After some second of execution the client on host computer starts to slow down or to loose data timing: for example instead of  to acquire every 250ms it will acquire and save data every 400-800ms. Sometimes, as in the picture, there are several tens of second between 2 acquisition. There is no wirewall running in the net of RT target.

To be sincere i developped this project using Lv2010 Sp1 and it has worked properly. After I installed Lv2013 I stated to have these kinds of troubles.

Have anybody experienced it?

Thank you

Antonio

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Does the Distributed System Manager show that the RT CPU is running at <80%?

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Hello,

 

What the FPGA Compilation Timing showed you when you did the compilation?

 

 

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