Index: PIControllers.h
===================================================================
diff -u -rca1d590217b1bfd14f0e0682f88e04de076ff199 -r8d437a49a2eb86dfb38674f18a1e514998b3931f
--- PIControllers.h	(.../PIControllers.h)	(revision ca1d590217b1bfd14f0e0682f88e04de076ff199)
+++ PIControllers.h	(.../PIControllers.h)	(revision 8d437a49a2eb86dfb38674f18a1e514998b3931f)
@@ -7,8 +7,8 @@
 *
 * @file    PIControllers.h
 *
-* @author  (last)      Michael Garthwaite
-* @date    (last)      11-Sep-2025
+* @author  (last)      Vinayakam Mani
+* @date    (last)      14-Apr-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  07-Oct-2024
@@ -45,11 +45,14 @@
     PI_CONTROLLER_ID_D12_PUMP,                      ///< Fresh dialysate Pump controller
     PI_CONTROLLER_ID_D48_PUMP,                      ///< Spent dialysate Pump controller
     PI_CONTROLLER_ID_D5_HEAT,                       ///< Primary heater controller
+    PI_CONTROLLER_ID_D5_HEAT_OUTER_LOOP,            ///< Primary heater controller outer loop
     PI_CONTROLLER_ID_D45_HEAT,                      ///< Trimmer heater controller
     PI_CONTROLLER_ID_RO_PUMP_FLOW,                  ///< RO Pump controller to flow
     PI_CONTROLLER_ID_RO_PUMP_PRES,                  ///< RO pump controller to maximum pressure
     PI_CONTROLLER_ID_BOOST_PUMP_FLOW,               ///< Boost pump controller to flow
     PI_CONTROLLER_ID_BOOST_PUMP_PRES,               ///< Boost pump controller to maximum pressure
+    PI_CONTROLLER_ID_BICARB_VOL,                    ///< Bicarb dose volume
+    PI_CONTROLLER_ID_ACID_VOL,                      ///< Acid dose volume
 #endif
     NUM_OF_PI_CONTROLLERS_IDS                       ///< Number of PI controllers
 } PI_CONTROLLER_ID_T;
@@ -69,6 +72,20 @@
     NUM_OF_CONTROLLER_SIGNAL                        ///< Number of PI controller signals
 } PI_CONTROLLER_SIGNALS_ID;
 
+/// Data structure for debugging PI controller signals.
+typedef struct DebugControllerSignals
+{
+    F32 controlSignalReference;                     ///< Reference value
+    F32 controlSignalMeasured;                      ///< Measured value
+    F32 controlSignalError;                         ///< Error value
+    F32 controlSignalErrorSum;                      ///< Error sum before anti-windup
+    F32 controlSignalErrorSumAfterWindup;           ///< Error sum after anti-windup
+    F32 controlSignalProportionalOutput;            ///< P portion of controller output signal
+    F32 controlSignalIntegralOutput;                ///< I portion of controller output signal
+    F32 controlSignalFeedDorwardOutput;             ///< Feed forward portion of controller output signal
+    F32 controlSingalControl;                       ///< Controller output signal
+ } PI_CONTROLLER_SIGNALS_DATA;
+
 /// Data structure for PI control profiles.
 typedef struct
 {
@@ -88,8 +105,10 @@
 void resetPIController( PI_CONTROLLER_ID_T controllerID, F32 initialControlSignal, F32 feedFowardSignal );
 F32 runPIController( PI_CONTROLLER_ID_T controllerID, F32 referenceSignal, F32 measuredSignal );
 F32 getPIControllerSignals( PI_CONTROLLER_ID_T controllerID, PI_CONTROLLER_SIGNALS_ID signalID );
-void setPIControllerStepLimit( PI_CONTROLLER_ID_T controllerID, F32 stepLimit );
+void setPIControllerFeedForward( PI_CONTROLLER_ID_T controllerID, F32 feedforward );
 
+PI_CONTROLLER_SIGNALS_DATA getDebugPIControllerSignals( PI_CONTROLLER_ID_T controllerID );
+
 /**@}*/
 
 #endif