diff --git a/src/energyplus/ReverseTranslator/ReverseTranslateScheduleCompact.cpp b/src/energyplus/ReverseTranslator/ReverseTranslateScheduleCompact.cpp
index 10329eff775..5b3debd3996 100644
--- a/src/energyplus/ReverseTranslator/ReverseTranslateScheduleCompact.cpp
+++ b/src/energyplus/ReverseTranslator/ReverseTranslateScheduleCompact.cpp
@@ -7,14 +7,29 @@
 
 #include "../../model/ScheduleCompact.hpp"
 #include "../../model/ScheduleCompact_Impl.hpp"
+#include "../../model/ScheduleInterval.hpp"
+#include "../../model/ScheduleInterval_Impl.hpp"
+#include "../../model/ScheduleFixedInterval.hpp"
+#include "../../model/ScheduleFixedInterval_Impl.hpp"
+#include "../../model/ScheduleVariableInterval.hpp"
+#include "../../model/ScheduleVariableInterval_Impl.hpp"
+#include "../../model/YearDescription.hpp"
+#include "../../model/YearDescription_Impl.hpp"
+
+#include "../../utilities/data/TimeSeries.hpp"
 
 #include "../../utilities/idf/IdfExtensibleGroup.hpp"
 
 #include <utilities/idd/Schedule_Compact_FieldEnums.hxx>
 #include <utilities/idd/OS_Schedule_Compact_FieldEnums.hxx>
+#include <utilities/idd/OS_Schedule_FixedInterval_FieldEnums.hxx>
+#include <utilities/idd/OS_Schedule_VariableInterval_FieldEnums.hxx>
 #include "../../utilities/idd/IddEnums.hpp"
 #include <utilities/idd/IddEnums.hxx>
 
+#include "../../utilities/time/Date.hpp"
+#include "../../utilities/core/ASCIIStrings.hpp"
+
 using namespace openstudio::model;
 
 namespace openstudio {
@@ -27,32 +42,118 @@ namespace energyplus {
       return boost::none;
     }
 
-    ScheduleCompact scheduleCompact(m_model);
+    std::vector<DateTime> dateTimes;
+    std::vector<double> values;
+    
+    int day = 1; // temp
+    boost::optional<Date> date;
+    boost::optional<Time> time;
+    for (IdfExtensibleGroup& eg : workspaceObject.extensibleGroups()) {
+      for (unsigned i = 0; i < eg.numFields(); ++i) {
+        if (boost::optional<std::string> s = eg.getString(i)) {
+          std::string lower = openstudio::ascii_to_lower_copy(s.get());
+          if (lower.find("through") != std::string::npos) {
+            //date = lower;
+            date = Date(MonthOfYear(1), day); // temp
+            ++day; // temp
+          } else if (lower.find("until") != std::string::npos) {
+            //time = lower;
+            //time = Time("24:00"); // temp
+            time = Time(0, 0, 0, 0);
+          }
+        }
+        if (date && time) {
+          DateTime datetime(*date, *time);
+          dateTimes.push_back(datetime);
+          date = boost::none;
+          time = boost::none;
+        }        
+        if (boost::optional<double> value = eg.getDouble(i)) {
+          values.push_back(value.get());
+        }
+      }
+    }    
+
+    boost::optional<Time> intervalLength;
+    intervalLength = Time(1, 0); // temp
+    bool forAllDays = true; // temp
+
+    if (intervalLength && forAllDays) {
+      Date startDateNoYear = dateTimes[0].date();
+      MonthOfYear monthOfYear = startDateNoYear.monthOfYear();
+      int dayOfMonth = startDateNoYear.dayOfMonth();
+      OS_ASSERT(dayOfMonth == 1);
+      
+      model::YearDescription yd = m_model.getUniqueModelObject<model::YearDescription>();
+      Date startDate = yd.makeDate(monthOfYear, dayOfMonth);
 
-    OptionalWorkspaceObject target = workspaceObject.getTarget(Schedule_CompactFields::ScheduleTypeLimitsName);
-    if (target) {
-      OptionalModelObject scheduleTypeLimits = translateAndMapWorkspaceObject(*target);
-      if (scheduleTypeLimits) {
-        scheduleCompact.setPointer(OS_Schedule_CompactFields::ScheduleTypeLimitsName, scheduleTypeLimits->handle());
+      TimeSeries timeseries(startDate, *intervalLength, createVector(values), "");
+      boost::optional<ScheduleInterval> scheduleInterval = ScheduleInterval::fromTimeSeries(timeseries, m_model);
+      OS_ASSERT(scheduleInterval);
+      boost::optional<ScheduleFixedInterval> scheduleFixedInterval = scheduleInterval->optionalCast<ScheduleFixedInterval>();
+      OS_ASSERT(scheduleFixedInterval);
+
+      OptionalWorkspaceObject target = workspaceObject.getTarget(Schedule_CompactFields::ScheduleTypeLimitsName);
+      if (target) {
+        OptionalModelObject scheduleTypeLimits = translateAndMapWorkspaceObject(*target);
+        if (scheduleTypeLimits) {
+          scheduleFixedInterval->setPointer(OS_Schedule_FixedIntervalFields::ScheduleTypeLimitsName, scheduleTypeLimits->handle());
+        }
       }
-    }
 
-    if (OptionalString os = workspaceObject.name()) {
-      scheduleCompact.setName(*os);
-    }
+      if (OptionalString os = workspaceObject.name()) {
+        scheduleFixedInterval->setName(*os);
+      }
 
-    for (IdfExtensibleGroup& eg : workspaceObject.extensibleGroups()) {
-      for (unsigned i = 0; i < eg.numFields(); ++i) {
-        if (auto value = eg.getString(i)) {
-          if (istringEqual(value.get(), "Interpolate:Average")) {
-            eg.setString(i, "Interpolate:Yes");
+      return scheduleFixedInterval.get();
+    } else if (forAllDays) {
+      TimeSeries timeseries(dateTimes, createVector(values), "");
+      boost::optional<ScheduleInterval> scheduleInterval = ScheduleInterval::fromTimeSeries(timeseries, m_model);
+      OS_ASSERT(scheduleInterval);
+      boost::optional<ScheduleVariableInterval> scheduleVariableInterval = scheduleInterval->optionalCast<ScheduleVariableInterval>();
+      OS_ASSERT(scheduleVariableInterval);
+
+      OptionalWorkspaceObject target = workspaceObject.getTarget(Schedule_CompactFields::ScheduleTypeLimitsName);
+      if (target) {
+        OptionalModelObject scheduleTypeLimits = translateAndMapWorkspaceObject(*target);
+        if (scheduleTypeLimits) {
+          scheduleVariableInterval->setPointer(OS_Schedule_VariableIntervalFields::ScheduleTypeLimitsName, scheduleTypeLimits->handle());
+        }
+      }
+
+      if (OptionalString os = workspaceObject.name()) {
+        scheduleVariableInterval->setName(*os);
+      }
+
+      return scheduleVariableInterval.get();
+    } else {
+      ScheduleCompact scheduleCompact(m_model);
+
+      OptionalWorkspaceObject target = workspaceObject.getTarget(Schedule_CompactFields::ScheduleTypeLimitsName);
+      if (target) {
+        OptionalModelObject scheduleTypeLimits = translateAndMapWorkspaceObject(*target);
+        if (scheduleTypeLimits) {
+          scheduleCompact.setPointer(OS_Schedule_CompactFields::ScheduleTypeLimitsName, scheduleTypeLimits->handle());
+        }
+      }
+
+      if (OptionalString os = workspaceObject.name()) {
+        scheduleCompact.setName(*os);
+      }
+
+      for (IdfExtensibleGroup& eg : workspaceObject.extensibleGroups()) {
+        for (unsigned i = 0; i < eg.numFields(); ++i) {
+          if (auto value = eg.getString(i)) {
+            if (istringEqual(value.get(), "Interpolate:Average")) {
+              eg.setString(i, "Interpolate:Yes");
+            }
           }
         }
+        scheduleCompact.pushExtensibleGroup(eg.fields());
       }
-      scheduleCompact.pushExtensibleGroup(eg.fields());
-    }
 
-    return scheduleCompact;
+      return scheduleCompact;
+    }
   }
 
 }  // namespace energyplus
diff --git a/src/energyplus/Test/ScheduleInterval_GTest.cpp b/src/energyplus/Test/ScheduleInterval_GTest.cpp
index b2d8851150c..f59cc3b1965 100644
--- a/src/energyplus/Test/ScheduleInterval_GTest.cpp
+++ b/src/energyplus/Test/ScheduleInterval_GTest.cpp
@@ -14,6 +14,8 @@
 #include "../../utilities/time/Time.hpp"
 
 #include "../../model/Model.hpp"
+#include "../../model/ScheduleCompact.hpp"
+#include "../../model/ScheduleCompact_Impl.hpp"
 #include "../../model/ScheduleInterval.hpp"
 #include "../../model/ScheduleInterval_Impl.hpp"
 #include "../../model/ScheduleFixedInterval.hpp"
@@ -1991,3 +1993,59 @@ TEST_F(EnergyPlusFixture, ScheduleFileRelativePath) {
     EXPECT_EQ(externalfile.filePath(), fileName.get());
   }
 }
+
+void Run_RoundTrip_IDF_to_IDF(const std::string& filename, Workspace& w) {
+  w.save(filename + "_1.idf", true);
+
+  ReverseTranslator rt;
+  Model m = rt.translateWorkspace(w);
+
+  m.save(filename + "_2.osm", true);
+
+  EXPECT_EQ(0, m.getConcreteModelObjects<ScheduleCompact>().size());
+  EXPECT_EQ(1, m.getConcreteModelObjects<ScheduleFixedInterval>().size());
+  EXPECT_EQ(0, m.getConcreteModelObjects<ScheduleVariableInterval>().size());
+
+  ForwardTranslator ft;
+  Workspace w2 = ft.translateModel(m);
+
+  w2.save(filename + "_3.idf", true);
+
+  std::vector<WorkspaceObject> scheduleCompacts = w.getObjectsByType(IddObjectType::Schedule_Compact);
+  std::vector<WorkspaceObject> scheduleCompacts2 = w2.getObjectsByType(IddObjectType::Schedule_Compact);
+  EXPECT_EQ(scheduleCompacts.size(), scheduleCompacts2.size());
+
+  std::vector<WorkspaceObject> scheduleTypeLimitss = w.getObjectsByType(IddObjectType::ScheduleTypeLimits);
+  std::vector<WorkspaceObject> scheduleTypeLimitss2 = w2.getObjectsByType(IddObjectType::ScheduleTypeLimits);
+  EXPECT_EQ(scheduleTypeLimitss.size(), scheduleTypeLimitss2.size() - 3); // OnOff, OnOff 1, Fractional 1
+}
+
+TEST_F(EnergyPlusFixture, RoundTrip_IDF_ScheduleInterval) {
+  Workspace w(StrictnessLevel::Minimal, IddFileType::EnergyPlus);
+
+  IdfObject scheduleTypeLimits(openstudio::IddObjectType::ScheduleTypeLimits);
+  scheduleTypeLimits.setString(0, "Temperature");
+  scheduleTypeLimits.setString(3, "Continuous");
+  scheduleTypeLimits.setString(4, "temperature");
+
+  IdfObject scheduleCompact(openstudio::IddObjectType::Schedule_Compact);
+  scheduleCompact.setString(0, "mains temperature schedule");
+  scheduleCompact.setString(1, "Temperature");
+  scheduleCompact.setString(2, "Through: 01/01");
+  scheduleCompact.setString(3, "For: AllDays");
+  scheduleCompact.setString(4, "Until: 24:00");
+  scheduleCompact.setDouble(5, 10.0422222222222);
+  scheduleCompact.setString(6, "Through: 01/02");
+  scheduleCompact.setString(7, "For: AllDays");
+  scheduleCompact.setString(8, "Until: 24:00");
+  scheduleCompact.setDouble(9, 9.98111111111111);
+  scheduleCompact.setString(10, "Through: 01/03");
+  scheduleCompact.setString(11, "For: AllDays");
+  scheduleCompact.setString(12, "Until: 24:00");
+  scheduleCompact.setDouble(13, 9.92111111111111);
+
+  w.addObject(scheduleTypeLimits);
+  w.addObject(scheduleCompact);
+
+  Run_RoundTrip_IDF_to_IDF("RoundTrip_ScheduleFixedInterval", w);
+}
diff --git a/src/epmodel/Loop/Loop.hpp b/src/epmodel/Loop/Loop.hpp
index b9e9962e420..18aeb2dfb2d 100644
--- a/src/epmodel/Loop/Loop.hpp
+++ b/src/epmodel/Loop/Loop.hpp
@@ -22,7 +22,7 @@ namespace openstudio {
 class AppGFuelType;
 class ComponentType;
 class FuelType;
-class IddObjectType;
+struct IddObjectType;
 class IdfObject;
 
 namespace epmodel {