cRIO-9144 (EtherCAT slave) freezes after master's clock changes

[JKSH]

Hello,

I have these chasses:

• cRIO 9024 (EtherCAT Master)
• 1x NI 9023
• cRIO 9144 (EtherCAT Slave)
• 1x NI 9023

The EtherCAT Master has these software items installed:

I monitor all the system's I/O channels in the Distributed System Manager. I apply an input, and I can see the values update.

However, when I manually change the current time on the cRIO 9024, the EtherCAT slave stops working:

• In the DSM, all of its channel values are completely frozen, while the EtherCAT master's channels still oscillate around the noise floor.
• The "ERR" LED on the cRIO 9144 does not turn on.

(I also tried making the cRIO 9024 a PTP slave, and updated the PTP master clock. The same thing happened -- EtherCAT slave stopped transmitting data)

Is this expected? My full project will involve many CompactRIOs, and I need to keep all their clocks in sync (using something like PTP or NTP). How can I synchronize the different cRIOs without losing EtherCAT slaves?

Thanks in advance

[DECONN]

Hi JKSH,

I recommend that you post to the Industrial Communications forum. That forum focuses on products such as EtherCAT systems so you may receive better responses there.

[JKSH]

Ok, posted at http://forums.ni.com/t5/Industrial-Communications/cRIO-9144-EtherCAT-slave-freezes-after-master-s-cl...