diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
index a79e426..051ef23 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
@@ -83,20 +83,26 @@ uint8_t g_rs485_id = 0;
 #define OPT_IN1               (GPIOB_ReadPortPin(GPIO_Pin_10))
 
 /*===========================================================================
- * LEDB 红色呼吸灯 (PB23, PWM11) — 快速心跳指示 (~2s 周期)
+ * LEDB 红色呼吸灯 (PB23, PWM11) — 心跳指示
  *   PWM freq ≈ 60MHz / (PWM_CLK_DIV * 128) ≈ 5.86kHz @DIV=80
- *   周期 = 16步渐亮 + 3tick高亮 + 16步渐灭 + 3tick低亮
- *       ≈ (16*50ms)*2 + 150ms*2 ≈ 1.9s
+ *   无光耦信号: 周期 ≈ 16步×2 + 3tick×2 ≈ 1.9s (DUTY_STEP=8, HOLD=3)
+ *   光耦有信号: 周期 ≈  8步×2 + 1tick×2 ≈ 0.9s (DUTY_STEP=16, HOLD=1)
+ *   复位模式(6)除外，光耦有信号不加速
  *===========================================================================*/
 #define  PWM_CLK_DIV          80
 #define  PWM_CYCLE            128          // 7-bit 分辨率 (0~127)
 #define  BREATH_STEP_DELAY    1            // 每 50ms 更新一次
 #define  BREATH_DUTY_STEP     8            // 每步跳 8 级占空比
+#define  BREATH_HOLD_TICKS    3            // 高/低电平保持 tick 数
 #define  BREATH_FADE_IN       0
 #define  BREATH_HOLD_HIGH     1
 #define  BREATH_FADE_OUT      2
 #define  BREATH_HOLD_LOW      3
 
+/* 光耦有信号时加速参数 (周期 ~1s) */
+#define  BREATH_OPTO_DUTY_STEP  16         // 步长加倍 → 渐亮/渐灭各 8 步
+#define  BREATH_OPTO_HOLD_TICKS 1          // 保持 50ms
+
 static uint8_t  g_breath_phase = BREATH_FADE_IN;
 static uint8_t  g_breath_duty  = 0;
 static uint8_t  g_breath_tick  = 0;
@@ -1335,47 +1341,60 @@ void TMR1_IRQHandler(void)
                 }
             }
 
-            /*--- LEDB 红色呼吸灯 (PWM11, 50ms tick, ~1.9s 心跳周期) ---*/
-            g_breath_tick++;
-            switch (g_breath_phase) {
-                case BREATH_FADE_IN:   // 渐亮 0 → max, ~800ms
-                    if (g_breath_tick >= BREATH_STEP_DELAY) {
-                        g_breath_tick = 0;
-                        if (g_breath_duty + BREATH_DUTY_STEP >= PWM_CYCLE) {
-                            g_breath_duty = PWM_CYCLE - 1;
-                            g_breath_phase = BREATH_HOLD_HIGH;
+            /*--- LEDB 红色呼吸灯 (PWM11, 50ms tick, 光耦有信号时加速 ~1s) ---*/
+            {
+                uint8_t _step, _hold;
+
+                /* 非复位模式下光耦有信号 → 红灯快闪 (现场判断光耦是否正常) */
+                if (g_opt_trigger && g_output_radar_mode != OUTPUT_MODE_LOOP_X_RESET) {
+                    _step = BREATH_OPTO_DUTY_STEP;
+                    _hold = BREATH_OPTO_HOLD_TICKS;
+                } else {
+                    _step = BREATH_DUTY_STEP;
+                    _hold = BREATH_HOLD_TICKS;
+                }
+
+                g_breath_tick++;
+                switch (g_breath_phase) {
+                    case BREATH_FADE_IN:
+                        if (g_breath_tick >= BREATH_STEP_DELAY) {
                             g_breath_tick = 0;
-                        } else {
-                            g_breath_duty += BREATH_DUTY_STEP;
+                            if (g_breath_duty + _step >= PWM_CYCLE) {
+                                g_breath_duty = PWM_CYCLE - 1;
+                                g_breath_phase = BREATH_HOLD_HIGH;
+                                g_breath_tick = 0;
+                            } else {
+                                g_breath_duty += _step;
+                            }
+                            PWM11_ActDataWidth(g_breath_duty);
                         }
-                        PWM11_ActDataWidth(g_breath_duty);
-                    }
-                    break;
-                case BREATH_HOLD_HIGH: // 最亮保持 ~150ms
-                    if (g_breath_tick >= 3) {
-                        g_breath_phase = BREATH_FADE_OUT;
-                        g_breath_tick = 0;
-                    }
-                    break;
-                case BREATH_FADE_OUT:  // 渐灭 max → 0, ~800ms
-                    if (g_breath_tick >= BREATH_STEP_DELAY) {
-                        g_breath_tick = 0;
-                        if (g_breath_duty <= BREATH_DUTY_STEP) {
-                            g_breath_duty = 0;
-                            g_breath_phase = BREATH_HOLD_LOW;
+                        break;
+                    case BREATH_HOLD_HIGH:
+                        if (g_breath_tick >= _hold) {
+                            g_breath_phase = BREATH_FADE_OUT;
                             g_breath_tick = 0;
-                        } else {
-                            g_breath_duty -= BREATH_DUTY_STEP;
                         }
-                        PWM11_ActDataWidth(g_breath_duty);
-                    }
-                    break;
-                case BREATH_HOLD_LOW:  // 最暗保持 ~150ms
-                    if (g_breath_tick >= 3) {
-                        g_breath_phase = BREATH_FADE_IN;
-                        g_breath_tick = 0;
-                    }
-                    break;
+                        break;
+                    case BREATH_FADE_OUT:
+                        if (g_breath_tick >= BREATH_STEP_DELAY) {
+                            g_breath_tick = 0;
+                            if (g_breath_duty <= _step) {
+                                g_breath_duty = 0;
+                                g_breath_phase = BREATH_HOLD_LOW;
+                                g_breath_tick = 0;
+                            } else {
+                                g_breath_duty -= _step;
+                            }
+                            PWM11_ActDataWidth(g_breath_duty);
+                        }
+                        break;
+                    case BREATH_HOLD_LOW:
+                        if (g_breath_tick >= _hold) {
+                            g_breath_phase = BREATH_FADE_IN;
+                            g_breath_tick = 0;
+                        }
+                        break;
+                }
             }
         }