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error:One heater seems decoupled from thermistor - disabling all for safety! Recv

useruser
edited November 2020 in Extruder & Bed
After upgrading the firmware from 1.0.3 to 1.0.4 i have the error meassage everytime (if i set to the Temp on extruder):
Recv:20:20:22.529: Error:One heater seems decoupled from thermistor - disabling all for safety!
Recv:20:20:22.533: Error:Could not hold temperature 250.00 measured 257.41 deg. C
I use PID autotune M303 P0 S200 R8 X0 C3 but it work very bad (i can see it error everytime after PID autotune).
Firmware you can see https://dropmefiles.com/x1Fig
Full logs:
Recv:21:17:13.042: DebugLevel:14
Recv:21:17:13.054: Error:One heater seems decoupled from thermistor - disabling all for safety!
Recv:21:17:13.056: Error:Could not hold temperature 195.00 measured 200.14 deg. C
Recv:21:17:13.056: RequestStop:
Recv:21:17:13.059: busy:processing
Recv:21:17:13.344: T:-444.00 /0 B:73.99 /0 B@:0 @:0 D0:2
Recv:21:17:14.442: T:-444.00 /0 B:73.62 /0 B@:0 @:0 D0:2
Recv:21:17:15.057: busy:processing
Recv:21:17:15.540: T:-444.00 /0 B:73.79 /0 B@:0 @:0 D0:2
Recv:21:17:16.638: T:-444.00 /0 B:73.74 /0 B@:0 @:0 D0:2
Recv:21:17:17.057: busy:processing
Recv:21:17:17.737: T:-444.00 /0 B:73.66 /0 B@:0 @:0 D0:2
Recv:21:17:18.444: TargetExtr0:0
Recv:21:17:18.455: T:-444.00 /0 B:73.74 /0 B@:0 @:0 D0:2
Recv:21:17:18.460: fatal:Heater decoupled during hold - Printer stopped and heaters disabled due to this error. Fix error and restart with M999.
Recv:21:17:18.461: Disabling all heaters due to detected sensor defect.
Recv:21:17:18.464: DebugLevel:14
Recv:21:17:18.464: RequestStop:



Comments

  • RepetierRepetier
    Looks like first overshoot which is quite normal. You need to increase the decoupling variance to a higher value so 7°C is not outside allowed region.
  • useruser
    edited November 2020
    Repetier said:
    Looks like first overshoot which is quite normal. You need to increase the decoupling variance to a higher value so 7°C is not outside allowed region.

    Yes, it is. What i need edit and where?
    In configuretion.h i can see:
    #define DECOUPLING_TEST_MAX_HOLD_VARIANCE 5
    #define DECOUPLING_TEST_MIN_TEMP_RISE 1

  • RepetierRepetier
    #define DECOUPLING_TEST_MAX_HOLD_VARIANCE 5

    Your values was 7 so would at least select 10 but if it deviates even more sometimes you can also increase to 15.
  • useruser
    Repetier said:
    #define DECOUPLING_TEST_MAX_HOLD_VARIANCE 5

    Your values was 7 so would at least select 10 but if it deviates even more sometimes you can also increase to 15.

    I set it to 10. It work ok now. Thx!
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