diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/include/rs485_modbus.h b/BLE/DLD154Pro_Peripheral_28K/APP/include/rs485_modbus.h
index 5848e9f..bfe01d4 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/include/rs485_modbus.h
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/include/rs485_modbus.h
@@ -23,6 +23,8 @@
 
 #define MB_HR_AUTO_RPT_ENABLE    0x0010   /* 主动上报使能 (0=关, 1=开) */
 #define MB_HR_ACTIVE_THRESHOLD   0x0011   /* 活动状态阈值 (|Variation|≥N) */
+#define MB_HR_SYSTEM_CMD         0x0012   /* 系统指令: 写 0x2C2C 复位 MCU */
+#define MB_CMD_RESET_MCU         0x2C2C   /* 复位 MCU 指令值 */
 
 /* 主动上报间隔 (mstick() 5ms/tick) */
 #define MB_RPT_IDLE_MS           160      /* 空闲: 800ms / 5ms = 160 tick */
diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
index 9fc8267..ca7340a 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
@@ -125,25 +125,7 @@ static void handle_query_freq(uint8_t addr)
 /* 0x2C — 复位初始化线圈 */
 static void handle_reset_init(uint8_t addr)
 {
-    (void)addr;
-    extern uint8_t  g_loop_stable;
-    extern uint8_t  loop1_LOOP_OK0;
-    extern uint8_t  loop1_LC_Reset;
-    extern uint8_t  loop1_INI_LOOP;
-    extern uint16_t loop1_stable_cnt;
-    extern uint16_t LC_Hold_CNT;
-    extern uint32_t loop1_ORG_CNT, loop1_ORG_SUM;
-
-    loop1_LC_Reset   = 1;
-    loop1_INI_LOOP   = 1;
-    loop1_LOOP_OK0   = 0;
-    g_loop_stable    = 0;
-    loop1_stable_cnt = 0;
-    LC_Hold_CNT      = 0;
-    loop1_ORG_CNT    = 0;
-    loop1_ORG_SUM    = 0;
-    _hb_need_init    = 1;
-    _last_car_state  = (_last_car_state ^ 1);
+    SYS_ResetExecute();
     PRINT("RS485: coil reset init\n");
 }
 
diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_modbus.c b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_modbus.c
index d777097..cda5e3b 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_modbus.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_modbus.c
@@ -550,6 +550,8 @@ static uint8_t read_hr_register(uint16_t addr, uint8_t *hi, uint8_t *lo)
         *hi = 0; *lo = _auto_rpt_enable; return 1;
     case 0x0011: /* Active Threshold */
         *hi = (uint8_t)(_active_threshold >> 8); *lo = (uint8_t)(_active_threshold); return 1;
+    case 0x0012: /* System Cmd (只读, 恒为 0) */
+        *hi = 0; *lo = 0; return 1;
     default:
         return 0;
     }
@@ -653,6 +655,12 @@ static void handle_write_single_reg(const uint8_t *rx, uint8_t rx_len)
     case 0x0011: /* Active Threshold: 0-65535 */
         _active_threshold = reg_val;
         break;
+    case 0x0012: /* System Cmd: 写 0x2C2C 复位 MCU */
+        if (reg_val == MB_CMD_RESET_MCU) {
+            SYS_ResetExecute();
+        }
+        /* 非法值: 忽略, 不响应异常 (对齐 700BS 0x2C 行为) */
+        return;
     default:
         send_exception(0x06, 0x02);  /* Illegal Data Address */
         return;
@@ -723,6 +731,13 @@ static void handle_write_multiple_regs(const uint8_t *rx, uint8_t rx_len)
                      if (_auto_rpt_enable) { _rpt_last_ms = mstick(); _rpt_active = 0; _rpt_hyst_cnt = 0; }
                      break;
         case 0x0011: _active_threshold = reg_val; break;
+        case 0x0012: /* System Cmd: 写 0x2C2C 复位 MCU */
+                     if (reg_val == MB_CMD_RESET_MCU) {
+                         SYS_ResetExecute();
+                         return;  /* 不复位则忽略非法值 */
+                     }
+                     /* 非法值: 忽略, 继续后续寄存器 */
+                     break;
         default:     send_exception(0x10, 0x02); return;
         }
     }