diff --git a/xiuosiot-frontend/src/views/terminal/PLC/monitor.vue b/xiuosiot-frontend/src/views/terminal/PLC/monitor.vue
index 7e3382a..0d9df48 100644
--- a/xiuosiot-frontend/src/views/terminal/PLC/monitor.vue
+++ b/xiuosiot-frontend/src/views/terminal/PLC/monitor.vue
@@ -720,7 +720,7 @@ export default {
     opacity: 1;
   }
   50% {
-    opacity: .5;
+    opacity: 0;
   }
   to {
     opacity: 1;