diff --git a/.settings/language.settings.xml b/.settings/language.settings.xml
index 4b8021f..65cd202 100644
--- a/.settings/language.settings.xml
+++ b/.settings/language.settings.xml
@@ -5,7 +5,7 @@
 			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
 			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
 			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
-			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-1141698828038963161" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT ARM Cross GCC Built-in Compiler Settings " parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="1336382746191491235" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT ARM Cross GCC Built-in Compiler Settings " parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
 				<language-scope id="org.eclipse.cdt.core.gcc"/>
 				<language-scope id="org.eclipse.cdt.core.g++"/>
 			</provider>
diff --git a/applications/PLC_link.c b/applications/PLC_link.c
index d32ded6..94ba06f 100644
--- a/applications/PLC_link.c
+++ b/applications/PLC_link.c
@@ -47,6 +47,10 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
         for (int i = 0; i < DI_TABLE_SIZE; i++) {
             di_table[i].current_state = (r_buffer[i / 8] >> (i % 8)) & 1;
         }
+    }else
+    {
+        rt_thread_mdelay(500);
+        return;
     }
 
     // 输出 m0256 -> RTU 2256
@@ -63,15 +67,26 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
         }
     }
     // 写入 Modbus
-    mb_write_bits(hinst, 2256, DO_TABLE_SIZE, w_buffer);
+    int mwy = mb_write_bits(hinst, 2256, DO_TABLE_SIZE, w_buffer);
+    if (mwy <= 0)
+    {
+        rt_thread_mdelay(500);
+        return;
+    }
 
     //输入寄存器d0->6000
     u16 r_regsD[AI_TABLE_SIZE];
     // 读 Modbus
-    mb_read_regs(hinst, 6000, AI_TABLE_SIZE, r_regsD);
-    for (int i = 0; i < AI_TABLE_SIZE; i++)
+    int mrd = mb_read_regs(hinst, 6000, AI_TABLE_SIZE, r_regsD);
+    if (mrd > 0)
     {
-        ai_table[i].current_Value = r_regsD[i];
+        for (int i = 0; i < AI_TABLE_SIZE; i++)
+        {
+            ai_table[i].current_Value = r_regsD[i];
+        }
+    }else {
+        rt_thread_mdelay(500);
+        return;
     }
 
     //输出寄存器d100->6100
@@ -81,7 +96,12 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
         w_regsD [i] = ao_table[i].current_Value;
     }
     // 写入 Modbus
-    mb_write_regs(hinst, 6100, AO_TABLE_SIZE, w_regsD);
+    int mwd = mb_write_regs(hinst, 6100, AO_TABLE_SIZE, w_regsD);
+    if (mwd > 0)
+    {
+        rt_thread_mdelay(500);
+        return;
+    }
 }
 
 static void mb_plc_thread(void *args)//线程服务函数