diff --git a/src/db/dbConvert.c b/src/db/dbConvert.c
index 181387568..d9708e750 100644
--- a/src/db/dbConvert.c
+++ b/src/db/dbConvert.c
@@ -16,6 +16,8 @@ of this distribution.
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include <math.h>
+#include <float.h>
 
 #include "dbDefs.h"
 #include "errlog.h"
@@ -32,6 +34,18 @@ of this distribution.
 #include "recGbl.h"
 #include "dbConvert.h"
 
+/*safe double to float conversion*/
+static void safeDoubleToFloat(double *pd,float *pf)
+{
+    double abs = fabs(*pd);
+    if(abs>=FLT_MAX) {
+        if(*pd>0.0) *pf = FLT_MAX; else *pf = -FLT_MAX;
+    } else if(abs<=FLT_MIN) {
+        if(*pd>0.0) *pf = FLT_MIN; else *pf = -FLT_MIN;
+    } else {
+        *pf = *pd;
+    }
+}
 /* DATABASE ACCESS GET CONVERSION SUPPORT */
 
 static long getStringString (
@@ -1881,12 +1895,13 @@ static long getDoubleFloat(
     double *psrc=(double *)(paddr->pfield);
 
     if(nRequest==1 && offset==0) {
-	*pbuffer = *psrc;
+        safeDoubleToFloat(psrc,pbuffer);
 	return(0);
     }
     psrc += offset;
     while (nRequest) {
-	*pbuffer++ = *psrc++;
+        safeDoubleToFloat(psrc,pbuffer);
+        ++psrc; ++pbuffer;
 	if(++offset==no_elements) psrc=(double *)paddr->pfield;
 	nRequest--;
     }
@@ -4090,12 +4105,13 @@ static long putDoubleFloat(
     float  *pdest=(float *)(paddr->pfield);
 
     if(nRequest==1 && offset==0) {
-	*pdest = *pbuffer;
+        safeDoubleToFloat(pbuffer,pdest);
 	return(0);
     }
     pdest += offset;
     while (nRequest) {
-	*pdest++ = *pbuffer++;
+        safeDoubleToFloat(pbuffer,pdest);
+        ++pbuffer; ++pdest;
 	if(++offset==no_elements) pdest=(float *)paddr->pfield;
 	nRequest--;
     }
diff --git a/src/db/dbFastLinkConv.c b/src/db/dbFastLinkConv.c
index 399d1a7d2..f6a6375f4 100644
--- a/src/db/dbFastLinkConv.c
+++ b/src/db/dbFastLinkConv.c
@@ -32,6 +32,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <math.h>
+#include <float.h>
 
 #include "dbDefs.h"
 #include "errlog.h"
@@ -932,7 +934,17 @@ static long cvt_d_f(
      double *from,
      float *to,
      struct dbAddr *paddr)
- { *to=*from; return(0); }
+{
+    double abs = fabs(*from);
+    if(abs>=FLT_MAX) {
+        if(*from>0.0) *to = FLT_MAX; else *to = -FLT_MAX;
+    } else if(abs<=FLT_MIN) {
+        if(*from>0.0) *to = FLT_MIN; else *to = -FLT_MIN;
+    } else {
+        *to = *from;
+    }
+    return(0);
+}
 
 /* Convert Double to Double */
 static long cvt_d_d(
diff --git a/src/db/db_access.c b/src/db/db_access.c
index 5a380dd92..06ee1ff2e 100644
--- a/src/db/db_access.c
+++ b/src/db/db_access.c
@@ -49,6 +49,8 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
+#include <math.h>
+#include <float.h>
 
 #include "dbDefs.h"
 #include "errlog.h"
@@ -484,9 +486,18 @@ struct dbr_ctrl_double{
 	double	value;			/* current value */
 };
 
-
-
-
+/*safe double to float conversion*/
+static void safeDoubleToFloat(double *pd,float *pf)
+{
+    double abs = fabs(*pd);
+    if(abs>=FLT_MAX) {
+        if(*pd>0.0) *pf = FLT_MAX; else *pf = -FLT_MAX;
+    } else if(abs<=FLT_MIN) {
+        if(*pd>0.0) *pf = FLT_MIN; else *pf = -FLT_MIN;
+    } else {
+        *pf = *pd;
+    }
+}
 
 /* From $cs/dblib/src/dbiocsubs.c
  * subroutines
@@ -1060,12 +1071,12 @@ void		*pfl
 		pold->precision = new.precision;
 		strncpy(pold->units,new.units,MAX_UNITS_SIZE);
 		pold->units[MAX_UNITS_SIZE-1] = '\0';
-		pold->upper_disp_limit = new.upper_disp_limit;
-		pold->lower_disp_limit = new.lower_disp_limit;
-		pold->upper_alarm_limit = new.upper_alarm_limit;
-		pold->upper_warning_limit = new.upper_warning_limit;
-		pold->lower_warning_limit = new.lower_warning_limit;
-		pold->lower_alarm_limit = new.lower_alarm_limit;
+                safeDoubleToFloat(&new.upper_disp_limit,&pold->upper_disp_limit);
+                safeDoubleToFloat(&new.lower_disp_limit,&pold->lower_disp_limit);
+                safeDoubleToFloat(&new.upper_alarm_limit,&pold->upper_alarm_limit);
+                safeDoubleToFloat(&new.upper_warning_limit,&pold->upper_warning_limit);
+                safeDoubleToFloat(&new.lower_warning_limit,&pold->lower_warning_limit);
+                safeDoubleToFloat(&new.lower_alarm_limit,&pold->lower_alarm_limit);
 		options=0;
 		nRequest=no_elements;
 		status = dbGetField(paddr,DBR_FLOAT,&(pold->value),&options,
@@ -1233,14 +1244,14 @@ void		*pfl
 		pold->precision = new.precision;
 		strncpy(pold->units,new.units,MAX_UNITS_SIZE);
 		pold->units[MAX_UNITS_SIZE-1] = '\0';
-		pold->upper_disp_limit = new.upper_disp_limit;
-		pold->lower_disp_limit = new.lower_disp_limit;
-		pold->upper_alarm_limit = new.upper_alarm_limit;
-		pold->upper_warning_limit = new.upper_warning_limit;
-		pold->lower_warning_limit = new.lower_warning_limit;
-		pold->lower_alarm_limit = new.lower_alarm_limit;
-		pold->upper_ctrl_limit = new.upper_ctrl_limit;
-		pold->lower_ctrl_limit = new.lower_ctrl_limit;
+                safeDoubleToFloat(&new.upper_disp_limit,&pold->upper_disp_limit);
+                safeDoubleToFloat(&new.lower_disp_limit,&pold->lower_disp_limit);
+                safeDoubleToFloat(&new.upper_alarm_limit,&pold->upper_alarm_limit);
+                safeDoubleToFloat(&new.upper_warning_limit,&pold->upper_warning_limit);
+                safeDoubleToFloat(&new.lower_warning_limit,&pold->lower_warning_limit);
+                safeDoubleToFloat(&new.lower_alarm_limit,&pold->lower_alarm_limit);
+                safeDoubleToFloat(&new.upper_ctrl_limit,&pold->upper_ctrl_limit);
+                safeDoubleToFloat(&new.lower_ctrl_limit,&pold->lower_ctrl_limit);
 		options=0;
 		nRequest=no_elements;
 		status = dbGetField(paddr,DBR_FLOAT,&(pold->value),&options,