Index: firmware/App/Controllers/HemoDiaFiltration.c
===================================================================
diff -u -r8acb1d02ac39d202a47338091b249ff2f30f5ea7 -r0bd52795bce4e805d9253042d02f39e309abbc54
--- firmware/App/Controllers/HemoDiaFiltration.c	(.../HemoDiaFiltration.c)	(revision 8acb1d02ac39d202a47338091b249ff2f30f5ea7)
+++ firmware/App/Controllers/HemoDiaFiltration.c	(.../HemoDiaFiltration.c)	(revision 0bd52795bce4e805d9253042d02f39e309abbc54)
@@ -399,6 +399,7 @@
         HDF_DATA_T data;
 
         data.hdfExecState                = (U32)hdfExecState;
+        data.hdfAutoSubState             = ( hdfManualRate > 0 ) ? FALSE : TRUE;
         data.hdfRequestedRate            = hdfManualRate;
 	    data.hdfTargetTMP                = getCurrentHDFTMPTarget();
         data.hdfCurrentRate              = getCurrentHDFRate();
Index: firmware/App/Controllers/HemoDiaFiltration.h
===================================================================
diff -u -r8acb1d02ac39d202a47338091b249ff2f30f5ea7 -r0bd52795bce4e805d9253042d02f39e309abbc54
--- firmware/App/Controllers/HemoDiaFiltration.h	(.../HemoDiaFiltration.h)	(revision 8acb1d02ac39d202a47338091b249ff2f30f5ea7)
+++ firmware/App/Controllers/HemoDiaFiltration.h	(.../HemoDiaFiltration.h)	(revision 0bd52795bce4e805d9253042d02f39e309abbc54)
@@ -47,6 +47,7 @@
 typedef struct
 {
     U32 hdfExecState;                                                   ///< Hemodiafiltration execution state
+    BOOL hdfAutoSubState;                                               ///< Hemodiafiltration auto substitution boolean
     F32 hdfRequestedRate;                                               ///< Hemodiafiltration requested manual rate
     F32 hdfTargetTMP;                                                   ///< Hemodiafiltration requested target TMP
     F32 hdfCurrentRate;                                                 ///< Hemodiafiltration current set rate