diff --git a/das-dn/hostadsbf/hostadsbf.cpp b/das-dn/hostadsbf/hostadsbf.cpp
index 2d62d090..ea54c3e8 100644
--- a/das-dn/hostadsbf/hostadsbf.cpp
+++ b/das-dn/hostadsbf/hostadsbf.cpp
@@ -853,6 +853,7 @@ BOOLEAN CHostADSBFProcess::OnPreCreate(int id)
 
     m_turbine = NULL;
     m_bRouteAdded = FALSE;
+    m_apdu_t0_begin = 10;
     SetLocalAmsNetId(AmsNetId(m_localNetId));
 #if 0
     m_threadRun = TRUE;
@@ -927,56 +928,43 @@ BOOLEAN CHostADSBFProcess::OnTimer(void)
     }
     if (sec_changed)
     {
-        if (m_turbine == NULL) {
-#if 0
-            m_turbine = new AdsDevice{m_remoteIp, AmsNetId(m_remoteNetId), m_remotePort};
-            const auto state = m_turbine->GetState();
-            if ((uint16_t)state.ads >= ADSSTATE::ADSSTATE_MAXSTATES || (uint16_t)state.device >= ADSSTATE::ADSSTATE_MAXSTATES)
+        if (m_turbine == NULL)
+        {
+            if ((m_apdu_t0_begin + 20) < system32.timers)
             {
-                vLog(LOG_DEBUG, "read device state error.\n");
-                long ret = AddRemoteRoute(m_remoteIp, m_localNetId, m_localIp, std::string("isoftstone"), std::string("admin"), std::string("admin"));
-                vLog(LOG_DEBUG, "bbb %s add route return value is: %d\n", m_pidName.c_str(), ret);
-                delete m_turbine;
-                m_turbine = NULL;
+                m_apdu_t0_begin = system32.timers;
+                //先添加一条路由
+                if (m_bRouteAdded == FALSE)
+                {
+                    long ret = AddRemoteRoute(m_remoteIp, AmsNetId(m_localNetId), m_localIp, std::string("isoftstone"), std::string("admin"), std::string("admin"));
+                    vLog(LOG_DEBUG, "%s add route(%s to %s) return value is: %d\n", m_pidName.c_str(), m_localIp.c_str(), m_remoteIp.c_str(), ret);
+                    if (ret != 0) return TRUE;
+                }
+                m_bRouteAdded = TRUE;
+                //添加成功
+                vLog(LOG_DEBUG, "%s start to connect(%s:%d)\n", m_pidName.c_str(), m_remoteIp.c_str(), m_remotePort);
+                m_turbine = new AdsDevice{m_remoteIp, AmsNetId(m_remoteNetId), m_remotePort};
+                const auto state = m_turbine->GetState();
+                if ((uint16_t)state.ads >= ADSSTATE::ADSSTATE_MAXSTATES || (uint16_t)state.device >= ADSSTATE::ADSSTATE_MAXSTATES)
+                {
+                    vLog(LOG_DEBUG, "%s read device state error.\n", m_pidName.c_str());
+                    delete m_turbine;
+                    m_turbine = NULL;
+                }
             }
-#else
-            //先添加一条路由
-            if (m_bRouteAdded == FALSE)
-            {
-                long ret = AddRemoteRoute(m_remoteIp, AmsNetId(m_localNetId), m_localIp, std::string("isoftstone"), std::string("admin"), std::string("admin"));
-                vLog(LOG_DEBUG, "%s add route(%s to %s) return value is: %d\n", m_localIp.c_str(), m_remoteIp.c_str(), m_pidName.c_str(), ret);
-                if (ret != 0) return TRUE;
-            }
-            m_bRouteAdded = TRUE;
-            //添加成功
-            vLog(LOG_DEBUG, "%s start to connect(%s:%d)\n", m_pidName.c_str(), m_remoteIp.c_str(), m_remotePort);
-            m_turbine = new AdsDevice{m_remoteIp, AmsNetId(m_remoteNetId), m_remotePort};
-            const auto state = m_turbine->GetState();
-            if ((uint16_t)state.ads >= ADSSTATE::ADSSTATE_MAXSTATES || (uint16_t)state.device >= ADSSTATE::ADSSTATE_MAXSTATES)
-            {
-                vLog(LOG_DEBUG, "%s read device state error.\n", m_pidName.c_str());
-                delete m_turbine;
-                m_turbine = NULL;
-            }
-#endif
             return TRUE;
         }
         if (!m_turbine->IsConnected()) return TRUE;
-        //try {
-            if (m_bHaveFTP)
-            {   //启动时读取一次，后面自己维护序号
-                if ((m_currentDirNo == -1) && (m_currentFileNo == -1))
-                {   //当前文件和目录都为-1，程序第一次启动。需要获取ftp目录及文件ID
-                    readFileID();
-                }
+        m_apdu_t0_begin = system32.timers;
+        if (m_bHaveFTP)
+        {   //启动时读取一次，后面自己维护序号
+            if ((m_currentDirNo == -1) && (m_currentFileNo == -1))
+            {   //当前文件和目录都为-1，程序第一次启动。需要获取ftp目录及文件ID
+                readFileID();
             }
-            readRealData();
-            FeedDog();
-//        }  catch (const AdsException& ex) {
-//            vLog(LOG_ERROR, "%s AdsException message: %s, remote is: %s:%d\n", m_pidName.c_str(), ex.what(), m_remoteIp.c_str(), m_remotePort);
-//        } catch (const std::runtime_error& ex) {
-//            vLog(LOG_ERROR, "%s %s\n", m_pidName.c_str(), ex.what());
-//        }
+        }
+        readRealData();
+        FeedDog();
     }
     return TRUE;
 }
diff --git a/das-dn/hostadsbf/hostadsbf.h b/das-dn/hostadsbf/hostadsbf.h
index 8fd129ee..891537f4 100644
--- a/das-dn/hostadsbf/hostadsbf.h
+++ b/das-dn/hostadsbf/hostadsbf.h
@@ -46,6 +46,7 @@ private:
 
     AdsDevice   *m_turbine;
     BOOLEAN     m_bRouteAdded;  //路由是否添加成功
+    DWORD       m_apdu_t0_begin;
 
     int         m_total_length;
     DWORD       last_sec;