diff --git a/src/ATBAPP/DeviceControllerDiag.cpp b/src/ATBAPP/DeviceControllerDiag.cpp
index f276126..80256ea 100644
--- a/src/ATBAPP/DeviceControllerDiag.cpp
+++ b/src/ATBAPP/DeviceControllerDiag.cpp
@@ -231,6 +231,8 @@ void DeviceControllerDiag::sys_superviseSystem()
 
 void DeviceControllerDiag::sub_componentAssessment()
 {
+    this->machineEventSet.clear();
+
     bool flag_sendOperate = true;
 
     struct T_moduleCondition modCond = {};