diff --git a/Oper.c b/Oper.c
index dd67862..7644167 100644
--- a/Oper.c
+++ b/Oper.c
@@ -11,9 +11,7 @@
 #define ENGINE_DIFF_SPEED       (400U)  // 2800 - 2400
 
 // IDLE_SEQ_MOD
-#define RPM_RAMP_START          (1500U)
 #define RPM_RAMP_END            (2400U)
-#define RPM_RAMP_RANGE          (RPM_RAMP_END - RPM_RAMP_START)   // 900
 #define TIME_RAMP_UP            (TIME_1SEC * 3UL)                 // 3초
 
 #define LED_OFF    (0U)
@@ -123,40 +121,18 @@ static void CProcessApuStateRetryCranking(void)
 
 static void CProcessApuStateEngineIdle(void)
 {
-#if 0 // '0' - 기존 코드, '1' - IDLE_SEQ_MOD
-    if (((Rx301.State >> 1U) & 0x07U) == (Uint16)IDX_ECU_STAT_OPERATION)
-    {
-        // 보조엔진제어기의 상태가 OPERATION이고 보조엔진의 속도가 2300 RPM 이상 5초 유지 시 발전상태로 전환
-        if (CGetEngineActualRpm() >= (ENGINE_OPERATION_SPEED - 100U)) // 2300 RPM
-        {
-            if (CSoftWaitCountProcedure(SOFTTIMER_WAIT_OPERATION, TIME_5SEC) == (Uint16)TIME_OVER)
-            {
-                GeneralOperValue.uiApuState = (Uint16)IDX_APU_OPER_GENERATING;
-            }
-        }
-        else
-        {
-            CSoftWaitCountClear(SOFTTIMER_WAIT_OPERATION);
-        }
-    }
-#else
     if (((Rx301.State >> 1U) & 0x07U) == (Uint16)IDX_ECU_STAT_OPERATION)
     {
         // ECU OPERATION 확인 즉시 발전 상태로 전환 (RPM Ramp는 CProcessApuStateGenerating에서 수행)
         GeneralOperValue.ulRampStartClock = 0UL;
         GeneralOperValue.uiApuState       = (Uint16)IDX_APU_OPER_GENERATING;
     }
-#endif
 }
 
 static void CProcessApuStateGenerating(void)
 {
-#if 0 // '0' - 기존 코드, '1' - IDLE_SEQ_MOD
-    CSetGcuCommand((Uint16)IDX_GCU_CMD_GENERATING); // 발전 명령 송신
-    GeneralOperValue.uiDynamicRPM = CDynamicRpmControl();
-    CSetEngineActualRpm(GeneralOperValue.uiDynamicRPM); // RPM 가변 제어 시작
-#else
     Uint32 ulElapsed;
+    Uint16 uiRampRange;
     Uint16 uiRampRpm;
 
     CSetGcuCommand((Uint16)IDX_GCU_CMD_GENERATING);
@@ -170,27 +146,29 @@ static void CProcessApuStateGenerating(void)
     {
         if (GeneralOperValue.ulRampStartClock == 0UL)
         {
+            Uint16 uiActual = CGetEngineActualRpm();
+            GeneralOperValue.uiRampStartRpm   = (uiActual < RPM_RAMP_END) ? uiActual : RPM_RAMP_END;
             GeneralOperValue.ulRampStartClock = CGetSoftClock();
-            CSetEngineActualRpm(RPM_RAMP_START);
+            CSetEngineActualRpm(GeneralOperValue.uiRampStartRpm);
         }
         else
         {
-            ulElapsed = (CGetSoftClock() + SYSTEM_10MIN_TIME - GeneralOperValue.ulRampStartClock) % SYSTEM_10MIN_TIME;
+            ulElapsed  = (CGetSoftClock() + SYSTEM_10MIN_TIME - GeneralOperValue.ulRampStartClock) % SYSTEM_10MIN_TIME;
+            uiRampRange = RPM_RAMP_END - GeneralOperValue.uiRampStartRpm; // 동적 범위
 
             if (ulElapsed < TIME_RAMP_UP)
             {
-                uiRampRpm = (Uint16)(RPM_RAMP_START + (Uint16)(((Uint32)RPM_RAMP_RANGE * ulElapsed) / TIME_RAMP_UP));
+                uiRampRpm = (Uint16)(GeneralOperValue.uiRampStartRpm + (Uint16)(((Uint32)uiRampRange * ulElapsed) / TIME_RAMP_UP));
                 CSetEngineActualRpm(uiRampRpm);
             }
             else
             {
-                GeneralOperValue.uiRampComplete    = 1U;
-                GeneralOperValue.uiDynamicRPM      = CDynamicRpmControl();
+                GeneralOperValue.uiRampComplete = 1U;
+                GeneralOperValue.uiDynamicRPM   = CDynamicRpmControl();
                 CSetEngineActualRpm(GeneralOperValue.uiDynamicRPM);
             }
         }
     }
-#endif
 }
 
 static void CProcessApuStateCooldown(void)
@@ -384,9 +362,9 @@ static void CInitialStandby(void)
 
     GeneralOperValue.uiEmergency = 0U;
 
-    GeneralOperValue.ulRampStartClock = 0UL; // IDLE_SEQ_MOD
+    GeneralOperValue.ulRampStartClock = 0UL; 
 
-    GeneralOperValue.uiRampComplete = 0U; // IDLE_SEQ_MOD
+    GeneralOperValue.uiRampComplete = 0U; 
 
     GpioDataRegs.GPBCLEAR.bit.GPIO55 = 1U; // GPIO_FAULT_CMD
 }
@@ -409,9 +387,9 @@ static void CEmergencyStop(void)
 
     GeneralOperValue.uiEmergency = 1U;
 
-    GeneralOperValue.ulRampStartClock = 0UL; // IDLE_SEQ_MOD
+    GeneralOperValue.ulRampStartClock = 0UL; 
 
-    GeneralOperValue.uiRampComplete = 0U; // IDLE_SEQ_MOD
+    GeneralOperValue.uiRampComplete = 0U; 
 
     GpioDataRegs.GPBSET.bit.GPIO55 = 1U; //GPIO_FAULT_CMD
 }
diff --git a/main.h b/main.h
index 4e4edfd..dabc0f4 100644
--- a/main.h
+++ b/main.h
@@ -211,8 +211,9 @@ typedef struct ClassGeneralOperValue
     Uint16 uiRetryCrankingCount;
     Uint16 uiWriteEepromDataStart;
     Uint32 ulTotalOperationHour;
-    Uint32 ulRampStartClock; // IDLE_SEQ_MOD
-    Uint16 uiRampComplete; // IDLE_SEQ_MOD
+    Uint32 ulRampStartClock;
+    Uint16 uiRampComplete;
+    Uint16 uiRampStartRpm;
     struct
     {
         Uint16 PlayCmd;