diff --git a/src/Makefile b/src/Makefile
index c8302a9..8c2c927 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -15,11 +15,13 @@ INC += pv/pvDatabase.h
 INC += pv/traceRecord.h
 INC += pv/removeRecord.h
 INC += pv/numericRecord.h
-
+INC += pv/pvSupport.h
+INC += pv/controlSupport.h
 include $(PVDATABASE_SRC)/copy/Makefile
 include $(PVDATABASE_SRC)/database/Makefile
 include $(PVDATABASE_SRC)/pvAccess/Makefile
 include $(PVDATABASE_SRC)/special/Makefile
+include $(PVDATABASE_SRC)/support/Makefile
 
 pvDatabase_LIBS += $(EPICS_BASE_PVA_CORE_LIBS)
 pvDatabase_LIBS += $(EPICS_BASE_IOC_LIBS)
diff --git a/src/pv/controlSupport.h b/src/pv/controlSupport.h
new file mode 100644
index 0000000..ce90158
--- /dev/null
+++ b/src/pv/controlSupport.h
@@ -0,0 +1,82 @@
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ * @author mrk
+ * @date 2019.06.01
+ */
+#ifndef CONTROLSUPPORT_H
+#define CONTROLSUPPORT_H
+
+#ifdef epicsExportSharedSymbols
+#   define pvdatabaseEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <pv/pvDatabase.h>
+#include <pv/pvSupport.h>
+
+#ifdef pvdatabaseEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef pvdatabaseEpicsExportSharedSymbols
+#endif
+
+#include <shareLib.h>
+#include <pv/pvStructureCopy.h>
+
+namespace epics { namespace pvDatabase { 
+
+class ControlSupport;
+typedef std::tr1::shared_ptr<ControlSupport> ControlSupportPtr;
+
+/**
+ * @brief Base interface for a ControlSupport.
+ *
+ */
+class epicsShareClass ControlSupport :
+    PVSupport
+{
+public:
+    POINTER_DEFINITIONS(ControlSupport);
+    /**
+     * The Destructor.
+     */
+    virtual ~ControlSupport();
+    /**
+     * @brief Optional  initialization method.
+     *
+     * A derived method <b>Must</b> call initControlSupport.
+     * @return <b>true</b> for success and <b>false</b> for failure.
+     */
+    virtual bool init();
+    /**
+     * @brief Optional method for derived class.
+     *
+     *  
+     */
+    virtual void process();
+    /**
+     *  @brief Optional method for derived class.
+     *
+     */
+    virtual void reset();
+    static ControlSupportPtr create(PVRecordPtr const & pvRecord);
+private:
+    ControlSupport(PVRecordPtr const & pvRecord);
+    PVRecordPtr pvRecord;
+    epics::pvData::PVScalarPtr pvValue;
+    epics::pvData::PVStructurePtr pvControl;
+    epics::pvData::PVDoublePtr pvLimitLow;
+    epics::pvData::PVDoublePtr pvLimitHigh;
+    epics::pvData::PVDoublePtr pvMinStep;
+    double requestedValue;
+    double currentValue;
+    bool isMinStep;
+};
+
+}}
+
+#endif  /* CONTROLSUPPORT_H */
+
diff --git a/src/pv/numericRecord.h b/src/pv/numericRecord.h
index be3a4b9..f1f502d 100644
--- a/src/pv/numericRecord.h
+++ b/src/pv/numericRecord.h
@@ -14,6 +14,7 @@
 #include <shareLib.h>
 
 #include <pv/channelProviderLocal.h>
+#include <pv/controlSupport.h>
 
 namespace epics { namespace pvDatabase { 
 
@@ -54,15 +55,8 @@ private:
     NumericRecord(
         std::string const & recordName,
         epics::pvData::PVStructurePtr const & pvStructure);
-    epics::pvData::PVScalarPtr pvValue;
-    epics::pvData::PVStructurePtr pvControl;
-    epics::pvData::PVStructurePtr pvValueAlarm;
-    epics::pvData::PVDoublePtr pvLimitLow;
-    epics::pvData::PVDoublePtr pvLimitHigh;
-    epics::pvData::PVDoublePtr pvMinStep;
-    double requestedValue;
-    double currentValue;
-    bool isMinStep;
+    ControlSupportPtr controlSupport;
+    epics::pvData::PVBooleanPtr pvReset;
 };
 
 }}
diff --git a/src/pv/pvSupport.h b/src/pv/pvSupport.h
new file mode 100644
index 0000000..be17c23
--- /dev/null
+++ b/src/pv/pvSupport.h
@@ -0,0 +1,84 @@
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ * @author mrk
+ * @date 2019.06.01
+ */
+#ifndef PVSUPPORT_H
+#define PVSUPPORT_H
+
+#ifdef epicsExportSharedSymbols
+#   define pvdatabaseEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <list>
+#include <map>
+
+#include <pv/pvData.h>
+#include <pv/pvTimeStamp.h>
+#include <pv/rpcService.h>
+
+
+#ifdef pvdatabaseEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef pvdatabaseEpicsExportSharedSymbols
+#endif
+
+#include <shareLib.h>
+#include <pv/pvStructureCopy.h>
+
+namespace epics { namespace pvDatabase { 
+
+class PVSupport;
+typedef std::tr1::shared_ptr<PVSupport> PVSupportPtr;
+
+/**
+ * @brief Base interface for a PVSupport.
+ *
+ */
+class epicsShareClass PVSupport 
+{
+public:
+    POINTER_DEFINITIONS(PVSupport);
+    /**
+     * The Destructor.
+     */
+    virtual ~PVSupport(){}
+    /**
+     * @brief Optional  initialization method.
+     *
+     * A derived method <b>Must</b> call initPVSupport.
+     * @return <b>true</b> for success and <b>false</b> for failure.
+     */
+    virtual bool init() {return true;}
+    /**
+     *  @brief Optional method for derived class.
+     *
+     * It is called before record is added to database.
+     */
+    virtual void start() {}
+    /**
+     * @brief Optional method for derived class.
+     *
+     *  It is the method that makes a record smart.
+     *  If it encounters errors it should raise alarms and/or
+     *  call the <b>message</b> method provided by the base class.
+     *  If the pvStructure has a top level timeStamp,
+     *  the base class sets the timeStamp to the current time.
+     */
+    virtual void process() = 0;
+    /**
+     *  @brief Optional method for derived class.
+     *
+     */
+    virtual void reset() {};
+};
+
+}}
+
+#endif  /* PVSUPPORT_H */
+
diff --git a/src/special/numericRecord.cpp b/src/special/numericRecord.cpp
index 9da7789..cc922a1 100644
--- a/src/special/numericRecord.cpp
+++ b/src/special/numericRecord.cpp
@@ -11,6 +11,7 @@
 #include <pv/pvDatabase.h>
 #include <pv/convert.h>
 #include <pv/standardField.h>
+#include <pv/controlSupport.h>
 
 #define epicsExportSharedSymbols
 
@@ -36,6 +37,7 @@ NumericRecordPtr NumericRecord::create(
     StandardFieldPtr standardField = getStandardField();
     StructureConstPtr  topStructure = fieldCreate->createFieldBuilder()->
         add("value",scalarType) ->
+        add("reset",pvBoolean) ->
         add("alarm",standardField->alarm()) ->
         add("timeStamp",standardField->timeStamp()) ->
         add("display",standardField->display()) ->
@@ -59,82 +61,22 @@ NumericRecord::NumericRecord(
 bool NumericRecord::init()
 {
     initPVRecord();
-    PVStructurePtr pvStructure = getPVStructure();
-    PVFieldPtr pv(pvStructure->getSubField("value"));
-    if(pv) {
-         if(pv->getField()->getType()==epics::pvData::scalar) {
-              ScalarConstPtr s = static_pointer_cast<const Scalar>(pv->getField());
-              if(ScalarTypeFunc::isNumeric(s->getScalarType())) {
-                   pvValue = static_pointer_cast<PVScalar>(pv);
-              }
-         }
-    }
-    if(!pvValue) {
-        cout << "create record " << getRecordName()
-        << " failed because not numeric scalar\n";
-        return false;
-    }
-    ConvertPtr convert = getConvert();
-    requestedValue = convert->toDouble(pvValue);
-    currentValue = requestedValue;
-    isMinStep = false;
-    pvControl = pvStructure->getSubField<PVStructure>("control");
-    pvLimitLow = pvControl->getSubField<PVDouble>("limitLow");
-    pvLimitHigh = pvControl->getSubField<PVDouble>("limitHigh");
-    pvMinStep = pvControl->getSubField<PVDouble>("minStep");
-    pvValueAlarm = pvStructure->getSubField<PVStructure>("valueAlarm");
+    PVRecordPtr pvRecord = shared_from_this();
+    controlSupport = ControlSupport::create(pvRecord);
+    bool result = controlSupport->init();
+    if(!result) return false;
+    pvReset = getPVStructure()->getSubField<PVBoolean>("reset");
     return true;
 }
 
 void NumericRecord::process()
 {
-    ConvertPtr convert = getConvert();
-    double value = convert->toDouble(pvValue);
-cout << "value " << value
-<< " requestedValue " << requestedValue
-<< " currentValue " << currentValue
-<< " isMinStep " << (isMinStep ? "true" : "false")
-<< "\n";
-    if(value==requestedValue&&value==currentValue) {
-        PVRecord::process();
-        return;
+    if(pvReset->get()==true) {
+        pvReset->put(false);
+        controlSupport->reset();
+    } else {
+        controlSupport->process();
     }
-    if(!isMinStep) requestedValue = value;
-    double limitLow = pvLimitLow->get();
-    double limitHigh = pvLimitHigh->get();
-    double minStep = pvMinStep->get();
-    if(limitHigh>limitLow) {
-        if(value>limitHigh) value = limitHigh;
-        if(value<limitLow) value = limitLow;
-        if(!isMinStep) {
-            if(requestedValue>limitHigh) requestedValue = limitHigh;
-            if(requestedValue<limitLow) requestedValue = limitLow;
-        }
-    }
-    if(minStep>0.0) {
-        double diff = requestedValue - currentValue;
-        if(diff<0.0) {
-            value = currentValue - minStep;
-            isMinStep = true;
-            if(value<requestedValue) {
-                 value = requestedValue;
-                 isMinStep = false;
-            }
-        } else {
-            value = currentValue + minStep;
-            isMinStep = true;
-            if(value>requestedValue)  {
-                 value = requestedValue;
-                 isMinStep = false;
-            }
-        }
-cout << "diff " << diff
-<< " value " << value
-<< " isMinStep " << (isMinStep ? "true" : "false")
-<< "\n";
-    }
-    currentValue = value;
-    convert->fromDouble(pvValue,value);
     PVRecord::process();
 }
 
diff --git a/src/support/Makefile b/src/support/Makefile
new file mode 100644
index 0000000..b8a9af9
--- /dev/null
+++ b/src/support/Makefile
@@ -0,0 +1,5 @@
+# This is a Makefile fragment, see ../Makefile
+
+SRC_DIRS += $(PVDATABASE_SRC)/support
+
+LIBSRCS += controlSupport.cpp
diff --git a/src/support/controlSupport.cpp b/src/support/controlSupport.cpp
new file mode 100644
index 0000000..c83c7db
--- /dev/null
+++ b/src/support/controlSupport.cpp
@@ -0,0 +1,125 @@
+/* controlSupport.cpp */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ * @author mrk
+ * @date 2019.06.01
+ */
+#include <pv/pvDatabase.h>
+#include <pv/pvSupport.h>
+#include <pv/convert.h>
+#include <pv/standardField.h>
+
+#define epicsExportSharedSymbols
+
+#include <pv/controlSupport.h>
+
+using std::tr1::static_pointer_cast;
+using namespace epics::pvData;
+using namespace epics::pvAccess;
+using namespace std;
+
+namespace epics { namespace pvDatabase { 
+
+ControlSupport::~ControlSupport()
+{
+cout << "ControlSupport::~ControlSupport()\n";
+}
+
+ControlSupportPtr ControlSupport::create(PVRecordPtr const & pvRecord)
+{
+   ControlSupportPtr support(new ControlSupport(pvRecord));
+   return support;
+}
+
+ControlSupport::ControlSupport(PVRecordPtr const & pvRecord)
+   : pvRecord(pvRecord)
+{}
+
+bool ControlSupport::init()
+{
+    PVStructurePtr pvStructure = pvRecord->getPVStructure();
+    PVFieldPtr pv(pvStructure->getSubField("value"));
+    if(pv) {
+         if(pv->getField()->getType()==epics::pvData::scalar) {
+              ScalarConstPtr s = static_pointer_cast<const Scalar>(pv->getField());
+              if(ScalarTypeFunc::isNumeric(s->getScalarType())) {
+                   pvValue = static_pointer_cast<PVScalar>(pv);
+              }
+         }
+    }
+    if(!pvValue) {
+        cout << "ControlSupport for record " << pvRecord->getRecordName()
+        << " failed because not numeric scalar\n";
+        return false;
+    }
+    ConvertPtr convert = getConvert();
+    requestedValue = convert->toDouble(pvValue);
+    currentValue = requestedValue;
+    isMinStep = false;
+    pvControl = pvStructure->getSubField<PVStructure>("control");
+    pvLimitLow = pvControl->getSubField<PVDouble>("limitLow");
+    pvLimitHigh = pvControl->getSubField<PVDouble>("limitHigh");
+    pvMinStep = pvControl->getSubField<PVDouble>("minStep");
+    return true;
+}
+
+void ControlSupport::process()
+{
+    ConvertPtr convert = getConvert();
+    double value = convert->toDouble(pvValue);
+cout << "value " << value
+<< " requestedValue " << requestedValue
+<< " currentValue " << currentValue
+<< " isMinStep " << (isMinStep ? "true" : "false")
+<< "\n";
+    if(value==requestedValue&&value==currentValue) return;
+    if(!isMinStep) requestedValue = value;
+    double limitLow = pvLimitLow->get();
+    double limitHigh = pvLimitHigh->get();
+    double minStep = pvMinStep->get();
+    if(limitHigh>limitLow) {
+        if(value>limitHigh) value = limitHigh;
+        if(value<limitLow) value = limitLow;
+        if(!isMinStep) {
+            if(requestedValue>limitHigh) requestedValue = limitHigh;
+            if(requestedValue<limitLow) requestedValue = limitLow;
+        }
+    }
+    if(minStep>0.0) {
+        double diff = requestedValue - currentValue;
+        if(diff<0.0) {
+            value = currentValue - minStep;
+            isMinStep = true;
+            if(value<requestedValue) {
+                 value = requestedValue;
+                 isMinStep = false;
+            }
+        } else {
+            value = currentValue + minStep;
+            isMinStep = true;
+            if(value>requestedValue)  {
+                 value = requestedValue;
+                 isMinStep = false;
+            }
+        }
+cout << "diff " << diff
+<< " value " << value
+<< " isMinStep " << (isMinStep ? "true" : "false")
+<< "\n";
+    }
+    currentValue = value;
+    convert->fromDouble(pvValue,value);
+}
+
+void ControlSupport::reset()
+{
+   isMinStep = false;
+}
+
+
+}}
+