Index: firmware/App/Controllers/DialOutFlow.c
===================================================================
diff -u -rb660c59e56cd7cd0123206e918aacc4225cca94b -r46e15981a836f5c96399fd684f06892c2c15cb6b
--- firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision b660c59e56cd7cd0123206e918aacc4225cca94b)
+++ firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision 46e15981a836f5c96399fd684f06892c2c15cb6b)
@@ -54,6 +54,7 @@
 #define MAX_DIAL_OUT_FLOW_RATE                  700             ///< Maximum dialysate outlet pump flow rate in mL/min.
 #define MIN_DIAL_OUT_FLOW_RATE                  100             ///< Minimum dialysate outlet pump flow rate in mL/min.
 
+#define MAX_DIAL_OUT_PUMP_PWM_CHANGE            0.05F           ///< Maximum duty cycle change allowed.
 #define MAX_DIAL_OUT_PUMP_PWM_STEP_UP_CHANGE    0.01064F        ///< Maximum duty cycle change when ramping up.
 #define MAX_DIAL_OUT_PUMP_PWM_STEP_DN_CHANGE    0.016F          ///< Maximum duty cycle change when ramping down.
 #define MAX_DIAL_OUT_PUMP_PWM_DUTY_CYCLE        0.90F           ///< Controller will error if PWM duty cycle > 90%, so set max to 89%.
@@ -846,10 +847,29 @@
             offsetPWMDutyCyclePct += ( ufrErr * P_UF );
 
             // Add PWM offset to DPi PWM mirror for our new DPo PWM
-            dialOutPumpPWMDutyCyclePctSet = getDialInPumpPWMDutyCyclePct( FALSE ) + offsetPWMDutyCyclePct;
+            dialOutPumpPWMDutyCyclePct = getDialInPumpPWMDutyCyclePct( FALSE ) + offsetPWMDutyCyclePct;
+
+            // change in PWM duty cycle should not cross the defined threshold value, if so, Limit the change to max 5% for a single control interval
+            if ( fabs( dialOutPumpPWMDutyCyclePct - dialOutPumpPWMDutyCyclePctSet ) > MAX_DIAL_OUT_PUMP_PWM_CHANGE )
+            {
+                if ( dialOutPumpPWMDutyCyclePctSet > dialOutPumpPWMDutyCyclePct )
+                {
+                    dialOutPumpPWMDutyCyclePctSet -= MAX_DIAL_OUT_PUMP_PWM_CHANGE;
+                }
+                else
+                {
+                    dialOutPumpPWMDutyCyclePctSet += MAX_DIAL_OUT_PUMP_PWM_CHANGE;
+                }
+            }
+            else
+            {
+                dialOutPumpPWMDutyCyclePctSet = dialOutPumpPWMDutyCyclePct;
+            }
+
             // Limit PWM range
             dialOutPumpPWMDutyCyclePctSet = MIN( dialOutPumpPWMDutyCyclePctSet, MAX_DIAL_OUT_PUMP_PWM_DUTY_CYCLE );
             dialOutPumpPWMDutyCyclePctSet = MAX( dialOutPumpPWMDutyCyclePctSet, MIN_DIAL_OUT_PUMP_PWM_DUTY_CYCLE );
+
             // Apply new PWM to DPo pump
             setDialOutPumpControlSignalPWM( dialOutPumpPWMDutyCyclePctSet );
         }
@@ -957,6 +977,7 @@
         dialOutBroadCastVariables.ufCalcRate       = ufMeasuredRate;
         dialOutBroadCastVariables.rotorHall        = ( hallSensor > 0 ? 0 : 1 );  // 1=home, 0=not home
         dialOutBroadCastVariables.currentSetUFRate = getCurrentUFSetRate();
+        dialOutBroadCastVariables.dialOutPumpState = (U32)dialOutPumpState;
 
         broadcastData( MSG_ID_DIALYSATE_OUT_FLOW_DATA, COMM_BUFFER_OUT_CAN_HD_BROADCAST, (U08*)&dialOutBroadCastVariables, sizeof( DIAL_OUT_FLOW_DATA_T ) );
         dialOutFlowDataPublicationTimerCounter = 0;