diff --git a/apps/usr_jb_proto/Protocol/jb_protocol.c b/apps/usr_jb_proto/Protocol/jb_protocol.c
index f8c61b5..cb210c8 100644
--- a/apps/usr_jb_proto/Protocol/jb_protocol.c
+++ b/apps/usr_jb_proto/Protocol/jb_protocol.c
@@ -647,6 +647,8 @@ static void jbUnpackDps(const uint8_t *bitmap, const uint8_t *values,
 /* ════════════════════════════════════════════════════════════════
  *  jbBuildDiffMask  —  比较上次与当前值，为变化的可上报 DP 置 mask 位
  *  返回: 1 = 有 DP 发生变化, 0 = 全部未变化
+ *  DP17 运行记录不参与差分：秒数常变，避免 2s 一包 124B；仍走读请求与定时全量
+
  * ════════════════════════════════════════════════════════════════ */
 static uint8_t jbBuildDiffMask(const jb_data_point_t *last,
                                 const jb_data_point_t *cur,
@@ -752,12 +754,7 @@ static uint8_t jbBuildDiffMask(const jb_data_point_t *last,
         mask[DP_ID_TIME_CONFIG7 / 8] |= (1 << (DP_ID_TIME_CONFIG7 % 8));
         hasChange = 1;
     }
-    /* DP17 运行记录 */
-    if (memcmp(last->run_record, cur->run_record, 124))
-    {
-        mask[DP_ID_RUN_RECORD / 8] |= (1 << (DP_ID_RUN_RECORD % 8));
-        hasChange = 1;
-    }
+    /* DP17 运行记录：不进差分（秒累加会刷 0x07）；0x05 读 / 10min 全量仍带 */
     /* DP19 设备故障使能 */
     if (last->fault_en != cur->fault_en)
     {