diff --git a/dotnet/IEC61850forCSharp/IEC61850CommonAPI.cs b/dotnet/IEC61850forCSharp/IEC61850CommonAPI.cs
index 6b3b0b2b..574d6c82 100644
--- a/dotnet/IEC61850forCSharp/IEC61850CommonAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850CommonAPI.cs
@@ -123,7 +123,9 @@ namespace IEC61850
 			/** periodic transmission of all data set values */
 			INTEGRITY = 8,
 			/** general interrogation (on client request) */
-			GI = 16
+			GI = 16,
+			/** Report will be triggered only on rising edge (transient variable) */
+			TRG_OPT_TRANSIENT = 128
 		}
 
 		/// <summary>
diff --git a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
index 122fedbd..e820d2db 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
@@ -871,11 +871,13 @@ namespace IEC61850
 
         public class DataAttribute : ModelNode
         {
-
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern IntPtr DataAttribute_create(string name, IntPtr parent, int type, int fc,
                 byte triggerOptions, int arrayElements, UInt32 sAddr);
 
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern void DataAttribute_setValue(IntPtr self, IntPtr mmsValue);
+
             internal DataAttribute(IntPtr self, ModelNode parent) : base(self)
             {
                 this.parent = parent;
@@ -889,6 +891,14 @@ namespace IEC61850
                 self = DataAttribute_create (name, parent.self, (int)type, (int)fc, (byte)trgOps, arrayElements, sAddr);
             }
 
+            /// <summary>
+            /// Set the value of the data attribute (can be used to set default values before server is created)
+            /// </summary>
+            /// <param name="value">New value for the data attribute</param>
+            public void SetValue(MmsValue value)
+            {
+                DataAttribute_setValue(self, value.valueReference);
+            }
         }
 
         public class ModelNode
diff --git a/src/iec61850/inc/iec61850_dynamic_model.h b/src/iec61850/inc/iec61850_dynamic_model.h
index c7da23c0..872ee425 100644
--- a/src/iec61850/inc/iec61850_dynamic_model.h
+++ b/src/iec61850/inc/iec61850_dynamic_model.h
@@ -137,6 +137,15 @@ LIB61850_API DataAttribute*
 DataAttribute_create(const char* name, ModelNode* parent, DataAttributeType type, FunctionalConstraint fc,
         uint8_t triggerOptions, int arrayElements, uint32_t sAddr);
 
+/**
+ * \brief Set the value of the data attribute (can be used to set default values before server is created)
+ * 
+ * \param self the data attribute instance
+ * \param value the new default value
+ */
+LIB61850_API void
+DataAttribute_setValue(DataAttribute* self, MmsValue* value);
+
 /**
  * \brief create a new report control block (RCB)
  *
diff --git a/src/iec61850/server/model/dynamic_model.c b/src/iec61850/server/model/dynamic_model.c
index 4377de8b..ea68d36d 100644
--- a/src/iec61850/server/model/dynamic_model.c
+++ b/src/iec61850/server/model/dynamic_model.c
@@ -607,6 +607,17 @@ DataAttribute_create(const char* name, ModelNode* parent, DataAttributeType type
     return self;
 }
 
+void
+DataAttribute_setValue(DataAttribute* self, MmsValue* value)
+{
+    if (self->mmsValue) {
+        MmsValue_update(self->mmsValue, value);
+    }
+    else {
+        self->mmsValue = MmsValue_clone(value);
+    }
+}
+
 DataSet*
 DataSet_create(const char* name, LogicalNode* parent)
 {