CAN communication with Plecs on TI C2000: (apparently) undeterministic behavior

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Hi there,

I am programming a TMS320F2837xD with Plecs. I am sending/receiving CAN messages using the CAN Tx/Rx blocks.

I have implemented some logic in order to propagate an emergency stop state across the three devices we have. See code attached.

The problem is the following:

  • My three devices are idle (in an ok state)
  • My code raises EStop (which is wrong)
  • I connect a PC with PCAN-View on the bus ==> EStop drops
  • I disconnect PCAN-View ==> EStop raises

It gets weirder:

  • I remove any CAN block in II Grid CAN and restart ==> problem is gone (i.e: EStop is down)

Any idea ?
Main_II_Grid_GFMI.plecs (523.4 KB)

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Hi Xavier, Just commenting on this post for future visitors to the forum. We have one of our developers who has proposed a fix for this issue and believe it is related to your previous forum post. We’ll incorporate our findings into the next bugfix release.

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Hi Bryan, the fix proposed by your developer seems good :+1:

I’ve sent my detailed feedback directly to her.

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Awesome, thanks for the update Xavier and for bringing this to our attention!