1588 synchronisation

[kabooom]

Hi !

I'm trying to synchronize severeal PXI chassis with 6682H board using 1588. And i have two problems :

1) When i connect two chassis together with a cat 5 Ethernet cable (through 6682 H) , the LED ACT doesn't blink. It is like the link is broken...

 - The interface corresponding to 1588 board is activated (eth2) and configured with an IP,

- I tryed to test it with another cable (same problem)

- I checked the drivers ( i have the same drivers on both), i tryed to uninstall and reinstall the drivers without success....

2) The second problem, is using another chassis. This time, the link ACT is blinking, the communication is ok. One of the board become the master and the other one the slave. The problem is that the offset from the time reference (slave) is always shifting from -500 to +500 ns... Normally it should be around +/- 47 ns. I waited about 1 hour, it never synchronize...

Any idea ???

[TylerK]

Hi,

If you are using LabVIEW RT, you may want to check the following thread:

6682h Network speed selection for IEEE 1588

http://forums.ni.com/t5/Counter-Timer/6682h-Network-speed-selection-for-IEEE-1588/td-p/2234614

"If you configure the PXI-6682 to be a primary network adapter, it should fix the synchronization issue. Let me know if this is a viable solution for you."

Regards,

-Tyler

[kabooom]

Hi Tyler!

Well, I tried different things. I reformat the target (RMC 8354 under RT), and installed old drivers (february 2012) from a virtual PC that i used bedore. I tryed on two targets, and now the boards seems to synchronize. I think there is a problem with the new drivers update, maybe the ethernet drivers or the 1588 drivers, i will try on the 3rd target to know if it solve the problem.

But effectively i had the problem with 100 Mb. The 100 Mb LED was off (it means i was on 10 Mb). Maybe due to drivers ?

[TylerK]

Which version of LabVIEW and LabVIEW Real-Time are you using?  

There is an issue on LabVIEW RT 2011 and 2012 where the PXI-6682’s network driver does not get properly initialized. Though on LabVIEW RT 2010 SP1 and early, the IEEE-1588/PTP should work correctly for the PXI-6682.

Regards,

-Tyler

[kabooom]

I installed Labview Real Time 2011 SP1. But i don't hink it comes from the OS, cause in both case i was using the same OS version, the only thing that differs was the version of the drivers, the first time i used drivers from august 2012 (it doesn't works), now i installed the drivers from february 2012 .

I already installed this version on 2 racks, now they are synchronized, i will install the same version on the 3rd configuration, and will made some test...

[kabooom]

Everything works fine with NI Device Drivers from february 2012...