diff --git a/uart/uart.cpp b/uart/uart.cpp
index aefd2cd..ee9d9de 100644
--- a/uart/uart.cpp
+++ b/uart/uart.cpp
@@ -389,8 +389,8 @@ int Uart::DealAskTask(uint16_t ushortAdd){
         mssleep(50000);
         UpdateConfig(ushortAdd);
     }
-    current_z = z;
     uint16_t next_duration = scheduler::instance().GetNextDuration(ushortAdd,z,next_task_id);
+    current_z = z;
     zlog_info(zct, "taskID = %d next_duration = %d next_task_id = %d,current_z = %d", taskID, next_duration, next_task_id,current_z);
 
     if(next_task_id == kScheduleWaveForm){