6682h Network speed selection for IEEE 1588

[SmileBoB]

Hi all, 

I'm currently trying to sync two PXI Chassis with IEE1588 with the PXI-6682h board.

I expected around +- 50ns of offset between the two chassis and I'm observing +-400 ns of offset with a great jitter...

I know that the precision is better when the two PXI chassis are connected directly together through a Cat 5 ethernet cable, that's my case !

How ever I noticed that the speed LED 10/100 is OFF on my 6682, it seems that my 6682 interfaces work at 10MBps...

I try to change the interface speed with max but if I choose another setting that autonegociating, my ACT/LED passed OFF and I have no synchro...

So my question is: how can I configure my 6682 to work at 100MBps ?

Best regards

[AlejandroZepeda]

Hi.

The speed can also be set in device manager for each network interface.  By default, it should be set to 'auto-negotiate', so I am not sure why in your case it would be connecting at 10Mb/s, but it is a good idea to verify correct configuration in device manager.

Open Device Manager and find the network cards corresponding to the 6682 boards.  They show up under 'Network Adapters' as 'AMD PCNET Family Ethernet Adapter'.  Right-click on it, select 'Properties', go to the 'Advanced' tab and make sure that the 'External PHY' property is set to 'Auto detect'.  If that is already the case for both of your boards, try setting both to '100Mbps Full Duplex' and see if that makes a difference.

Hope this helps.

Alejandro

[SmileBoB]

Hi, thanks for your response.

I just forgot to mention that I'm running LabVIEW RT 2011 SP1 +(VS 2011 SP1) on my PXI.

The drivers set is the one shipped with the NI Developper Suite SRL of August 2012.

Bye,

CLEMESSY

[TylerK]

Hi,

I tested the couple PXI-6682s on LabVIEW RT and found the following.  On some versions of LabVIEW RT, there is an issue where the PXI-6682’s network adapter does not get properly initialized and comes up in 10Mbps/Full Duplex mode.  This happens only when the NIC is a secondary network adapter.  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

[TylerK]

Hi,

When you install software to your LabVIEW RT system, change the version of "NI RT Extensions for SMP (MultiCore Support)" from 12.0 to 11.0.1 (see image below).

The PXI-6682's Ethernet driver does not get properly initialized on LabVIEW 2012, but it will work properly on LabVIEW RT 2011 SP1.  The August 2012 device drivers DVD installs the LabVIEW RT 2012 component mentioned above.

I hope this helps,

-Tyler

[kabooom]

Hi Tilerk !

Will it be fixed with Mars 2013 drivers ?

[TylerK]

Hi,

This issue will be fixed in the next release of LabVIEW Real-Time.  Though, the version of NI-Sync on the next device driver DVD will not contain a fix.  This is a high priority issue, and we are evaluating fixing it in future releases of NI-Sync.

Regards,

-Tyler

[bbauvir]

Hi,

Thanks for this post. We have upgraded to LV2012 and NI-SYNC 3.3.5 and are suffering since from similar problems.

Connecting to a 100MbE Cisco Systems IE3000 switch set to link auto-negociation would resolve at 10Mb/half-duplex operation and the PXI-6682 would seem to function.

Trying to force both sides (IE3000 and PXI-6682) to 100Mb/full-duplex does cause a link failure.

We can not manage to operate the PXI-6682 boards on more recent 100MbE/1GbE switches.

Moving back to an older version of LV is not an option for us. Looking forward to receiving a fix.

Kind regards,

Bertrand.

[Andrea_Perin]

The fix to this issue has been delivered with LV RT 2012 SP1.

Best regards

Andrea