diff --git a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
index f42f45e..42d50d9 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
+++ b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
@@ -121,6 +121,7 @@ typedef struct {
 
     /*--- 计数器 ---*/
     uint16_t Hold_CNT;
+    uint16_t hold_time;                // 有限存在时长 (tick 数)
     uint8_t  INCNT, OUTCNT;
 
     /*--- 输出配置 ---*/
diff --git a/vd960Loop/utilities/at32f421_freertos_demo/src/TaskLoop.c b/vd960Loop/utilities/at32f421_freertos_demo/src/TaskLoop.c
index 0addd46..c8187f7 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/src/TaskLoop.c
+++ b/vd960Loop/utilities/at32f421_freertos_demo/src/TaskLoop.c
@@ -295,7 +295,7 @@ void TMR15_GLOBAL_IRQHandler(void)
                 /* 有限存在超时 */
                 if (unit->loop_VD_HOLD) {
                     unit->Hold_CNT++;
-                    if (unit->Hold_CNT > HOLD_TIME) {
+                    if (unit->Hold_CNT > unit->hold_time) {
                         unit->loop_VD_HOLD = 0;
                         unit->Hold_CNT = 0;
                         if (unit->loop_VD_FLAG) {
diff --git a/vd960Loop/utilities/at32f421_freertos_demo/src/storage.c b/vd960Loop/utilities/at32f421_freertos_demo/src/storage.c
index 1db86ed..498d456 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/src/storage.c
+++ b/vd960Loop/utilities/at32f421_freertos_demo/src/storage.c
@@ -184,6 +184,7 @@ void para_store_init(void)
             g_loop_states.loop_unit[i].loop_SensLevel = unitout->sensitvity & 0x03;
             g_loop_states.loop_unit[i].SET_PLUS = unitout->output_mode & 0x01;
             g_loop_states.loop_unit[i].SET_DLY  = (unitout->output_mode >> 1) & 0x01;
+            g_loop_states.loop_unit[i].hold_time = unitout->exist_mode * 20 * 5;
             
             unitout++;
         }