diff --git a/src/App.vue b/src/App.vue
index 3c8549a..15ece4f 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -369,7 +369,7 @@ export default {
     selectOffLineDevice() {
       Object.keys(this.isOnline).forEach(key => {
           // console.log(key, new Date().getTime() - this.isOnline[key])
-        if (new Date().getTime() - this.isOnline[key] > (1000 * 30)) {
+        if (new Date().getTime() - this.isOnline[key] > (1000 * 60 * 60)) {
           console.log('error', key)
             this.$confirm(`设备${key}已离线`, '设备离线', {
               cancelButtonText: '关闭',