PT100 Sensor Daughterboard



  • Duet Ethernet
    Duex5
    Daughterboard PT100 connected on Duex5 (but also tried on Duet itself)
    Channel 1: 2 wire PT100 with jumpers installed
    Channel 2 4 wire PT100 without jumpers

    Both sensors measure 108.9 ohm

    Changed in config.g
    M305 P0 X204
    M305 P1 X205

    Also tried with 100 ohm resistor (with jumpers) on both channels.
    Also gave a try to do it on Duet mainboard with X200/X201

    All with the same result: 2000°C...

    Also tried two brand new PT100 daughterboards (V1.1) - nothing changed...

    Any ideas??? 🆘


  • administrators

    When you send or re-send the M305 command, what is the response?

    Do you have a PanelDue or an external SD card connected to CONN_SD using the ribbon cable? If so, does the PT100 work if you disconnect that?



  • No, nothing connected on that interfaces. Actually only the Mini USB and Ethernet. Mini USB is for receiving G Codes and ethernet only for maintenance reasons...


  • administrators

    OK, so what response do you get when you re-send the M305 command?



  • When resending all seems to be fine. In webinterface it is green and i my console I get an OK.



  • @pmj said in PT100 Sensor Daughterboard:

    Actually only the Mini USB and Ethernet. Mini USB is for receiving G Codes and et

    on a side node. are you aware of this?
    https://duet3d.dozuki.com/Wiki/USB_ground_loops


  • administrators

    @pmj said in PT100 Sensor Daughterboard:

    When resending all seems to be fine. In webinterface it is green and i my console I get an OK.

    1. Which firmware version are you running?

    2. Please provide your complete config.g file.

    3. Which devices have the PT100 sensors? Your use of P0 and P1 in the M305 commands suggests the bed heater and the first extruder heater: is that correct?



  • now I've found time again to solve the PT100 issue. Still the same situation showing up 2000C... All double checked again and went through all forum.
    Firmware: Just updated today from 2.02 to 2.03 latest RC => no change
    config.g attached (without some details)
    Devices:
    P0 => general temperature measurement up to 80°C (2-wire, with conbectors on X205)
    P1 => Heatbed sensor (4-wire, without connectors on X204)

    0_1561986375097_config.g



  • @veti yes I'm aware of this, anyway thanks for the input 😉



  • SOLVED!!! Found the failure... overseen, that i changed with M307 also P0 and P1.... canceled the two lines and now working like a charme!


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