diff --git a/src/views/page/realTime.vue b/src/views/page/realTime.vue
index 872dbdec..073061f3 100644
--- a/src/views/page/realTime.vue
+++ b/src/views/page/realTime.vue
@@ -1978,7 +1978,7 @@ export default {
         },
         getDCF(item,data){
             var index=item.id-42
-            var num=data[1174]
+            var num=data[1174]?data[1174]:0
                 var num1 = this.padString(num.toString(2), 8)
 
             var openListNew = []