Desktop RT - TTN - Clock Synchronization

[Joachim082]

Hi,

I have been using a Desktop-RT system with a Time Triggered Network for more than 1 year with no problems (LV 8.2). Because I have to make a software update and I am developing with 8.5 I also did an update on my Desktop RT machines. Unfortunately after the update my slave computer hangs up during the clock synchronization dialog and only a hardware reset helps to reconnect (see  "8.5_ttn.JPG").

For the deterministic communication we use the PCI 8232 and for the public network the Intel 8255 card. What can cause this crash? Reading a network shared variable works without problems but only the time triggered variable. The time triggered variable is transmitted in a dedicated time slot (from 100 us to 130 us) - the cycle time is 1000 us. Enclosed you can find the complete RT-Network.

Maybe it is a known issue or somebody has an hint for me.

Best Regards,

Joachim

[Elmar_NI]

Hello Joachim,

you are already in contact about the issue with National Instruments.
It works with our PXI systems. I guess you got the special offer to send your RT Desktop PCs to National Instruments Germany for further testing.

Kind regards,

Elmar

[Joachim082]

Hello Elmar,

I have heard about this option to send the equipment to NI Germany after this posting. I also think that in a forum everybody is invited to give hints or suggestions - maybe it is an known issue. We are using the Desktop RT system on a very critical production aggregate and a simple software update shouldn't result in such a longsome challenge.

To summarize my tests I think that the system becomes inconsistent after trying to run the startup application on the slave machine.

Kind Regards,

Joachim

P.S.: Today we shipped the Desktop-RT equipment.