Heated Bed Max Temperature Issue

lee7670

Hello, ever since updating to RRF 3.01RC3 on my Duet 3, I've been having an issue where my max heated bed heater temperatures (there are 2 heaters and sensors) are not being set correctly. I try to set a temperature higher than 125 and the board spits out a temperature too high for heater error.
I have copied the relevant section of my config.g below.

M308 S0 P"temp0" Y"pt1000" A"Bed Right Rear" R2200         ; configure sensor 0 as PT1000 on pin temp0
M950 H0 C"out7" T0                       ; create bed heater output on out7 and map it to sensor 0
M143 H0 P0 S200 A2 C-1                            ; set temperature limit for heater 0 to 200C
M307 H0 B0 S1.00                         ; disable bang-bang mode for the bed heater and set PWM limit
M308 S2 P"temp2" Y"pt1000" A"Bed Left Rear" R2200
M950 H2 C"out8" T2
M143 H2 P0 S200 A2 C-1
M307 H2 B0 S1.00
M140 P1 H0
M140 P2 H2

Thank you!

dc42

Try moving the M143 commands for the bed heaters after the corresponding M140 commands. Either the M307 command or the M140 command is resetting the temperature limit.

lee7670

Great! That fixed it, but now my Duet Web Control graphs go up to 2000 degrees for some reason.

Here's the new section.

M140 P1 H0
M140 P2 H2
M143 H2 P0 S200 A2 C-1
M143 H0 P0 S200 A2 C-1                            ; set temperature limit for heater 0 to 200C

And here's what my temperature graph looks like.

Thanks!

dc42

@lee7670 said in Heated Bed Max Temperature Issue:

Great! That fixed it, but now my Duet Web Control graphs go up to 2000 degrees for some reason.

Please post your whole config.g file, also config-override.g if you use it.