diff --git a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
index 0c086b3..a779b36 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
+++ b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
@@ -190,7 +190,8 @@ typedef struct {
  * 全局状态
  *===========================================================================*/
 typedef struct {
-    uint32_t report_counter;            // 上报间隔计数器 (50ms tick)
+    uint32_t report_counter;            // 上报间隔计数器 (50ms tick, 自由运行不复位)
+    uint32_t last_report_tick;          // 上次上报时刻, 用于增量判断
     uint8_t  report_misc_round;         // 空闲轮转: 0=MISC_TYPE_TIME, 1=CUT, 2=FLOW, 3=RELAY
     Loop154_Unit loop_unit[LOOP_CAPTURE_MAX];
 } Loop154_States;
diff --git a/vd960Loop/utilities/at32f421_freertos_demo/src/main.c b/vd960Loop/utilities/at32f421_freertos_demo/src/main.c
index 4a3dcfa..44ecbed 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/src/main.c
+++ b/vd960Loop/utilities/at32f421_freertos_demo/src/main.c
@@ -429,7 +429,7 @@ void uart_report_packet_loop_acs(uint8_t flag)
     } else {
         _interval = REPORT_IDLE_TICKS;    // 12×50ms = 600ms
     }
-    if (g_loop_states.report_counter < _interval) return;
+    if ((g_loop_states.report_counter - g_loop_states.last_report_tick) < _interval) return;
 
     /*--- 3. 确定本轮杂项类型 ---*/
     if (_flag_event) {
@@ -526,7 +526,7 @@ void uart_report_packet_loop_acs(uint8_t flag)
     g_pkg_uart_report.pkg[i++] = _sum & 0xFF;
 
     usart1_sendstring(g_pkg_uart_report.pkg, i);
-    g_loop_states.report_counter = 0;
+    g_loop_states.last_report_tick = g_loop_states.report_counter;
 }
 
 
@@ -1062,7 +1062,7 @@ void TMR6_GLOBAL_IRQHandler(void)
                 }
             }
 
-            g_loop_states.report_counter = 0;
+            g_loop_states.last_report_tick = g_loop_states.report_counter;
         }