Heater fault and PS_ON signal.

[javitopia]

The fire safety guide, in the hard shutdown of heaters section (https://duet3d.dozuki.com/Wiki/FireSafety#Section_Hard_shutdown_of_heaters) mentions that the firmware, in case of a heater fault, can use the PS_ON signal to turn off the heaters (providing there are external componentes, such as a relay, using that signal.).

Is this implemented by the firmware? As i haven't seen it in action in my printer in response to a heater fault. That being said, i haven't experienced an uncontrollable heater fault, only badly calibrated heaters that trigger the preotection and are shut down, so the temerature start to fall inmediayelly.

So if its implemented, under what circunstances is this funcionality triggered?

[Zhang Jianyu]

You would need to configure a M143 heater protection instance to trigger a power shutdown. Something like this:

M143 H1 P1 S300 A3 ; Set heater 1 monitor 1 to trigger printer shutdown if temp exceeds 300C

see https://duet3d.dozuki.com/Wiki/Gcode#Section_M143_in_RRF_3_01RC2_and_later

[javitopia]

Thank you!.

I'll update the wiki so it is easier to find.

[alankilian]

This post is deleted!