diff --git a/src/protocol/libmms_s/src/mms_s.cpp b/src/protocol/libmms_s/src/mms_s.cpp
index 8be8b88..5f1eaeb 100644
--- a/src/protocol/libmms_s/src/mms_s.cpp
+++ b/src/protocol/libmms_s/src/mms_s.cpp
@@ -217,9 +217,9 @@ LOCAL void *mms_s_run_task(void *parameter)
     IedModel *iedModel = (IedModel *)parameter;
     while(g_running)
     {
-        IedServer_lockDataModel(gp_iedServer);
+        // IedServer_lockDataModel(gp_iedServer);
 
-        IedServer_unlockDataModel(gp_iedServer);
+        // IedServer_unlockDataModel(gp_iedServer);
 
 
         Thread_sleep(100);
diff --git a/src/system/libdatacenter/src/dc_signal.cpp b/src/system/libdatacenter/src/dc_signal.cpp
index a0236f3..da3bcfb 100644
--- a/src/system/libdatacenter/src/dc_signal.cpp
+++ b/src/system/libdatacenter/src/dc_signal.cpp
@@ -1273,6 +1273,16 @@ int dc_signal_ao_set_val_without_check(const std::string &saddr, uint8_t data_ty
 
         dc_set_signal_val(p_signal->vec_p_data[0], data_type, p_data);
         dc_set_param_cfg_change(true);
+
+        for(auto &entry : p_signal->change_cb_list)
+        {
+            if(entry.second)
+            {
+                if (entry.first == module_id) continue;
+                entry.second(saddr, SIGNAL_CTRL_STEP::DIRECT, data_type, 0, p_data);
+            }
+        }
+
         return 0;
     }
     else
@@ -1497,6 +1507,16 @@ int dc_signal_param_set_val_without_check(const std::string &saddr, uint8_t data
         }
         dc_set_signal_val(p_signal->vec_p_data[setting_zone], data_type, p_data);
         dc_set_param_cfg_change(true);
+
+        for(auto &entry : p_signal->change_cb_list)
+        {
+            if(entry.second != nullptr)
+            {
+                if (entry.first == module_id) continue;
+                entry.second(saddr, SIGNAL_CTRL_STEP::DIRECT, data_type, setting_zone, p_data);
+            }
+        }
+
         return 0;
     }
 
diff --git a/src/system/libiec61850s/src/iec61850s.cpp b/src/system/libiec61850s/src/iec61850s.cpp
index 14f9237..135dae9 100644
--- a/src/system/libiec61850s/src/iec61850s.cpp
+++ b/src/system/libiec61850s/src/iec61850s.cpp
@@ -30,6 +30,24 @@ LOCAL std::vector<stru_mms_s_setting> g_vec_setting = {};
 LOCAL std::vector<stru_mms_s_param> g_vec_param = {};
 LOCAL mms_s_value_update_cb g_mms_s_value_update_cb = NULL;
 
+LOCAL std::string g_sg_zone_saddr = "";
+LOCAL std::string g_sg_zone_act_sg = "";
+
+LOCAL void check_sg_zone_change()
+{
+    if(g_sg_zone_saddr.empty() || g_sg_zone_act_sg.empty())
+    {
+        return;
+    }
+
+    if(g_mms_s_value_update_cb != NULL)
+    {
+        g_mms_s_value_update_cb(g_sg_zone_saddr.c_str(), g_sg_zone_act_sg.c_str());
+    }
+
+    g_sg_zone_saddr = "";
+    g_sg_zone_act_sg = "";
+}
 
 LOCAL void iec61850s_sg_change_callback(const char *zone_saddr, int new_act_sg)
 {
@@ -62,12 +80,9 @@ LOCAL void iec61850s_sg_change_callback(const char *zone_saddr, int new_act_sg)
                 return;
             }
 
-            // /* 同步更新 MMS 服务端模型，使 IEDScout 等客户端能读到最新值 */
-            // std::string val_str = dc_get_signal_val(p_val, setting.base.type);
-            // if(g_mms_s_value_update_cb != NULL)
-            // {
-            //     g_mms_s_value_update_cb(zone_saddr, val_str.c_str());
-            // }
+            /* 同步更新 MMS 服务端模型，使 IEDScout 等客户端能读到最新值 */
+            g_sg_zone_saddr = zone_saddr;
+            g_sg_zone_act_sg = dc_get_signal_val((void *)&new_act_sg, setting.base.type);
 
             break;
         }
@@ -552,6 +567,7 @@ void *app_iec61850s(void *arg)
 
         if(event & EV_TIMER3)
         {
+            check_sg_zone_change();
             p_app->run_cnt++;
         }
     }