bed heater output > 125C not allowed....Duet3/RRF3

[imrj]

i have ran as high as 150C on my older Duet2 no problem, some materials like ABS need it and I have an A/C bed with SSR relay so it heats up pretty quick....where is the restriction coming from because in my config.g I have the line below, but it doesnt seem to care, it cuts off after 125C regardless.....do I need to move it to another heater output?

M308 S0 P"temp0" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M143 H0 S150 ; set temperature limit for heater 0 to 150C
M307 H0 A450.2 C282.2 D6.3 S1.00 V0.0 B0
M140 H0 ; map heated bed to heater 0

[deckingman]

@imrj Just a couple of suggestions until someone more knowledgable come along. Try add P0 to your M143, so M143 H0 P0 S150. P0 should be the default but just in case.... You could also try adding A0 as well - again that should be the default. Finally, try putting M140 H0 before the M143.

I've no idea if any of the above will help - just a hunch base on https://duet3d.dozuki.com/Wiki/Gcode#Section_M143_in_RRF_3_01RC2_and_later

[dc42]

You can also send M143 H0 with no further parameters to report the current limit.

[imrj]

ok yup the M143 H0 P0 S150 did the job, all is well......RRF3 keeps playing tricks on me

[deckingman]

@imrj Glad that worked but TBH, I think this should be flagged as something that needs looking at.
@dc42 David, thoughts? From what the OP has reported, unless P0 is added to M143, then the limit will default to 125 Deg C regardless.

[dc42]

I'm sorry, I can't reproduce that using firmware 3.01-RC6. M143 H0 S150 works for me with no P parameter. I've also checked the code, and P will indeed default to 0.

@imrj, which version of RRF3 are you using?

[imrj]

@dc42 RepRapFirmware for Duet 3 MB6HC version 3.01-RC5 running on Duet 3 MB6HC v0.6 or 1.0