@phaedrux said in Duet3 6HC does not restart after M999:
M999 just resets the board. If the board relies on M80 in config.g to keep the 5V supply on, then of course it will power off.
I perfectly understand and agree on this fact. But the behaviour of M999 on firmware 3.2.2 is totally different. Hence if there has been no changes, the mechanics of M999 on firmware 3.3 should produce the same outcome as on firmware 3.2.2 .
As for firmware 3.4b6, I agree there will be an issue due to the modification made (power supply control pin is not assigned by default).
I am not an expert, as far as I understand this issue will impact a user trying to control an ATX/meanwell power supply straight from the duet board, since the lost of 5V would set the power supply in standby mode. Please do correct me if i am wrong.
Thank you.