7i95 randomly throws error with raspi b

Hi all 
after working for 1 hour without any issue the 7i95t randomly resets with error in raspi b 8gb. I have a dedicated heat sink with fans on the raspi b. I am using latest linuxcnc 2.9 image for raspi b given on the website.  Please let me know the reason if anyone has faced a similar problem

What error?

If the 7I95T actually resets, that's a power supply issue.

To the OP just for reference next time could you specify if you are using a RPi4 or RPi5 so if we need to look at the images it makes life easier. As both the 4 & 5 come in B variants.

Cheers
Rob

It is a raspi 4 8 gb version. I tried with a changed power supply and after few hours it again reset. Upon pressing the reset button the axis showed no movement. However, after restarting linuxcnc it started working fine.

I think PCW was referring to the power supply for the mesa card.

You may also be experiencing issues with the RPi4 ethernet powering down, this is a much talked about issue.
If you look at the RPi sticky under installing Linuxcnc the very last post discusses this issue with a link to some trouble shooting.

I think it was the wording "reset". To actually reset a 7I95T
you need to cycle the power (or issue a reset command but
LinuxCNC never does this)

If this is a real time error, it may be that the servo thread period
needs to be increased to say 2 ms as 1 ms is marginal on a RPI4.