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Under review

XC43 random R4:3 3:1:7 fault after upgrading to Design 7.03.25

Dániel Novák 1 month ago in IQANdesign updated by Gustav Widén (System support) 4 weeks ago 1

After upgrading to IQANDesign 7.03.25 from 7.02.33, the XC43 module in our system shows "no contact" error, with R4:3 3:1:7 fault code blinking. The fault goes away after system restart, but randomly gets back after several restarts (cca. with 1:50 probability). Currently 2 of 15 identical systems shows the same issue. Reviewed the logs, the faults only came after the update (the machines were under tests for about 1-2 months with software made with IQAN Design 7.02.33). The firmware update to 2.02 was successful, as I see from module info.

MD4-7 - MC42FS - XC43 multimaster system.

We will tomorrow revert to IQANDesign 7.02.33. I hope the firmware reverts too from 2.02 to 2.01, as we have to deliver the machines soon.

Probable bug in XC4x 2.02 firmware?

Under review

I am only aware of one know of one case where this blink code shows; the first time after updating to 1.03 or newer. 

Image 4598


When it happens in another situation, I think that a closer look at supply voltage during startup could be interesting. It can also be interesting to look for errors related to the VREF.