Merge pull request #4914 from Rerouter/PID-Unconstrained-Itemp

Pid unconstrained itemp

Marlin/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/Cartesio/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
     //24V 500W silicone heater on to 4mm glass CartesioW
     #define  DEFAULT_bedKp 390
     #define  DEFAULT_bedKi 70

Marlin/example_configurations/Felix/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Felix 2.0+ electronics with v4 Hotend
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   // Felix Foil Heater
   #define DEFAULT_bedKp 103.37
   #define DEFAULT_bedKi 2.79

Marlin/example_configurations/Felix/DUAL/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Felix 2.0+ electronics with v4 Hotend

Marlin/example_configurations/Hephestos/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Hephestos i3
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/Hephestos_2/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 250  // If the temperature difference between the target temperature and the actual temperature
                                     // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Tuned PID values using M303
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/K8200/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   //#define  DEFAULT_bedKp 10.00

Marlin/example_configurations/K8400/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/K8400/Dual-head/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/RigidBot/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //RigidBot, from pid autotune
   #define  DEFAULT_bedKp 355
   #define  DEFAULT_bedKi 66.5

Marlin/example_configurations/SCARA/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 20 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Merlin Hotend: From Autotune
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //12v Heatbed Mk3 12V in parallel
   //from pidautotune
   #define  DEFAULT_bedKp 630.14

Marlin/example_configurations/TAZ4/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 16 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //24V 360W silicone heater from NPH on 3mm borosilicate (TAZ 2.2+)
   #define  DEFAULT_bedKp 20
   #define  DEFAULT_bedKi 5

Marlin/example_configurations/WITBOX/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Witbox
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/adafruit/ST7565/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/delta/biv2.5/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/delta/generic/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/delta/kossel_mini/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/delta/kossel_pro/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 50 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // Kossel Pro
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //Kossel Pro heated bed plate with borosilicate glass
   //from pidautotune (M303 E-1 S60 C8)
   #define  DEFAULT_bedKp 370.25

Marlin/example_configurations/delta/kossel_xl/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 15.00

Marlin/example_configurations/makibox/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/example_configurations/tvrrug/Round2/Configuration.h

                                   // Set/get with gcode: M301 E[extruder number, 0-2]
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
-  #define PID_INTEGRAL_DRIVE_MAX PID_MAX  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
 
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
-  #define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
-
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
   #define  DEFAULT_bedKp 10.00

Marlin/temperature.cpp

     int Temperature::lpq_ptr = 0;
   #endif
 
-  float Temperature::pid_error[HOTENDS],
-        Temperature::temp_iState_min[HOTENDS],
-        Temperature::temp_iState_max[HOTENDS];
+  float Temperature::pid_error[HOTENDS];
   bool Temperature::pid_reset[HOTENDS];
 #endif
 
         Temperature::pTerm_bed,
         Temperature::iTerm_bed,
         Temperature::dTerm_bed,
-        Temperature::pid_error_bed,
-        Temperature::temp_iState_min_bed,
-        Temperature::temp_iState_max_bed;
+        Temperature::pid_error_bed;
 #else
   millis_t Temperature::next_bed_check_ms;
 #endif
     #if ENABLED(PID_EXTRUSION_SCALING)
       last_e_position = 0;
     #endif
-    HOTEND_LOOP() {
-      temp_iState_max[e] = (PID_INTEGRAL_DRIVE_MAX) / PID_PARAM(Ki, e);
-    }
-  #endif
-  #if ENABLED(PIDTEMPBED)
-    temp_iState_max_bed = (PID_BED_INTEGRAL_DRIVE_MAX) / bedKi;
   #endif
 }
 
         }
         pTerm[HOTEND_INDEX] = PID_PARAM(Kp, HOTEND_INDEX) * pid_error[HOTEND_INDEX];
         temp_iState[HOTEND_INDEX] += pid_error[HOTEND_INDEX];
-        temp_iState[HOTEND_INDEX] = constrain(temp_iState[HOTEND_INDEX], temp_iState_min[HOTEND_INDEX], temp_iState_max[HOTEND_INDEX]);
         iTerm[HOTEND_INDEX] = PID_PARAM(Ki, HOTEND_INDEX) * temp_iState[HOTEND_INDEX];
 
         pid_output = pTerm[HOTEND_INDEX] + iTerm[HOTEND_INDEX] - dTerm[HOTEND_INDEX];
       pid_error_bed = target_temperature_bed - current_temperature_bed;
       pTerm_bed = bedKp * pid_error_bed;
       temp_iState_bed += pid_error_bed;
-      temp_iState_bed = constrain(temp_iState_bed, temp_iState_min_bed, temp_iState_max_bed);
       iTerm_bed = bedKi * temp_iState_bed;
 
       dTerm_bed = K2 * bedKd * (current_temperature_bed - temp_dState_bed) + K1 * dTerm_bed;
     // populate with the first value
     maxttemp[e] = maxttemp[0];
     #if ENABLED(PIDTEMP)
-      temp_iState_min[e] = 0.0;
-      temp_iState_max[e] = (PID_INTEGRAL_DRIVE_MAX) / PID_PARAM(Ki, e);
       #if ENABLED(PID_EXTRUSION_SCALING)
         last_e_position = 0;
       #endif
     #endif //PIDTEMP
-    #if ENABLED(PIDTEMPBED)
-      temp_iState_min_bed = 0.0;
-      temp_iState_max_bed = (PID_BED_INTEGRAL_DRIVE_MAX) / bedKi;
-    #endif //PIDTEMPBED
   }
 
   #if ENABLED(PIDTEMP) && ENABLED(PID_EXTRUSION_SCALING)

Marlin/temperature.h

         static int lpq_ptr;
       #endif
 
-      static float pid_error[HOTENDS],
-                   temp_iState_min[HOTENDS],
-                   temp_iState_max[HOTENDS];
+      static float pid_error[HOTENDS];
       static bool pid_reset[HOTENDS];
     #endif
 
                    pTerm_bed,
                    iTerm_bed,
                    dTerm_bed,
-                   pid_error_bed,
-                   temp_iState_min_bed,
-                   temp_iState_max_bed;
+                   pid_error_bed;
     #else
       static millis_t next_bed_check_ms;
     #endif