diff --git a/ITC81DB_2/Controls/CenterConfiguration/ControlCenterConfiSerial.cs b/ITC81DB_2/Controls/CenterConfiguration/ControlCenterConfiSerial.cs
index 4e2170d..bd492a9 100644
--- a/ITC81DB_2/Controls/CenterConfiguration/ControlCenterConfiSerial.cs
+++ b/ITC81DB_2/Controls/CenterConfiguration/ControlCenterConfiSerial.cs
@@ -931,7 +931,7 @@ namespace ITC81DB_2.Controls
                 this.buttonTestSend.Enabled = true;
 
             this.SaveComboBox(this.comboBoxSerialBaudRate.SelectedIndex, this.comboBoxSerialMode.SelectedIndex);
-            this.ParentForm.ParentForm.ChildFormMainDisplay.UpdateIconDisplay();
+            this.ParentForm.ParentForm.ChildFormMainDisplay.UpdateIcomDisplay();
 
             this.ButtonAddOnDisplay();
             this.buttonSave.Enabled = false;
diff --git a/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs b/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
index 48596c5..c5ca6f8 100644
--- a/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
+++ b/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
@@ -63,7 +63,7 @@ namespace ITC81DB_2.Controls
         private void DefaultSetting()
         {
             this.labelSerialNo.Text = this.ParentForm.ParentForm.SystemConfig.SerialNumber;
-            this.labelDisplayVer.Text = "3.1.2";
+            this.labelDisplayVer.Text = "3.1.3";
         }
 
         public void UpdateMainBoardVersionDisplay(string version)
diff --git a/ITC81DB_2/Forms/FormMainDisplay.cs b/ITC81DB_2/Forms/FormMainDisplay.cs
index 23ee1cc..0b642e4 100644
--- a/ITC81DB_2/Forms/FormMainDisplay.cs
+++ b/ITC81DB_2/Forms/FormMainDisplay.cs
@@ -438,6 +438,93 @@ namespace ITC81DB_2.Forms
                 this.pictureBoxFeedbackEnable.Visible = false;
             }
         }
+        /// <summary>
+        /// 사용안함(Modbus 유료화 추가되면 사용할 것)
+        /// </summary>
+        public void UpdateIconDisplay()
+        {
+            int value = 0;
+
+            // Icon - COM1 
+            if (this.ParentForm.SystemConfig.SerialCOM1Mode == 0)
+            {
+                this.pictureBoxCOM1Enable.Visible = false;
+                this.pictureBoxCOM1Disable.Visible = true;
+            }
+            else
+            {
+                if (this.ParentForm.SystemConfig.SerialCOM1Mode == (int)Define.E_CommMode.f5_Modbus && this.ParentForm.SystemConfig.IsModbus == false)
+                {
+                    this.pictureBoxCOM1Enable.Visible = false;
+                    this.pictureBoxCOM1Disable.Visible = true;
+                }
+                else
+                {
+                    this.pictureBoxCOM1Enable.Visible = true;
+                    this.pictureBoxCOM1Disable.Visible = false;
+                }
+            }
+
+            // Icon - COM3
+            if (this.ParentForm.SystemConfig.SerialCOM3Mode == (int)Define.E_CommMode.f0_None)
+            {
+                this.pictureBoxCOM3Enable.Visible = false;
+                this.pictureBoxCOM3Disable.Visible = true;
+            }
+            else
+            {
+                if (this.ParentForm.SystemConfig.SerialCOM3Mode == (int)Define.E_CommMode.f5_Modbus && this.ParentForm.SystemConfig.IsModbus == false)
+                {
+                    this.pictureBoxCOM3Enable.Visible = false;
+                    this.pictureBoxCOM3Disable.Visible = true;
+                }
+                else
+                {
+                    this.pictureBoxCOM3Enable.Visible = true;
+                    this.pictureBoxCOM3Disable.Visible = false;
+                }
+            }
+
+            // Icon - COM3
+            if (this.ParentForm.SystemConfig.SerialCOM4Mode == 0)
+            {
+                this.pictureBoxCOM4Enable.Visible = false;
+                this.pictureBoxCOM4Disable.Visible = true;
+            }
+            else
+            {
+                if (this.ParentForm.SystemConfig.SerialCOM4Mode == (int)Define.E_CommMode.f5_Modbus && this.ParentForm.SystemConfig.IsModbus == false)
+                {
+                    this.pictureBoxCOM4Enable.Visible = false;
+                    this.pictureBoxCOM4Disable.Visible = true;
+                }
+                else
+                {
+                    this.pictureBoxCOM4Enable.Visible = true;
+                    this.pictureBoxCOM4Disable.Visible = false;
+                }
+            }
+
+            // 옵션보드
+            try
+            {
+                value = int.Parse(this.ParentForm.CurrentSystemParameter9507.OptionBoard);
+            }
+            catch
+            {
+                value = 0;
+            }
+            if (value == 1 && int.Parse(this.ParentForm.CurrentSystemParameter9508.OPT1SamplingCount) != 0) // Feedback
+            {
+                this.pictureBoxFeedbackDisable.Visible = false;
+                this.pictureBoxFeedbackEnable.Visible = true;
+            }
+            else
+            {
+                this.pictureBoxFeedbackDisable.Visible = true;
+                this.pictureBoxFeedbackEnable.Visible = false;
+            }
+        }
         private void UpdateDisplayUser(SystemStatus status) 
         {
             string id = "", group = "";
@@ -706,90 +793,6 @@ namespace ITC81DB_2.Forms
                 this.pictureBoxEthernetDisconnection.Visible = true;
             }
         }
-        public void UpdateIconDisplay()
-        {
-            int value = 0;
-
-            // Icon - COM1 
-            if (this.ParentForm.SystemConfig.SerialCOM1Mode == 0)
-            {
-                this.pictureBoxCOM1Enable.Visible = false;
-                this.pictureBoxCOM1Disable.Visible = true;
-            }
-            else
-            {
-                if (this.ParentForm.SystemConfig.SerialCOM1Mode == 22 && this.ParentForm.SystemConfig.IsModbus == false)
-                {
-                    this.pictureBoxCOM1Enable.Visible = false;
-                    this.pictureBoxCOM1Disable.Visible = true;
-                }
-                else
-                {
-                    this.pictureBoxCOM1Enable.Visible = true;
-                    this.pictureBoxCOM1Disable.Visible = false;
-                }
-            }
-
-            // Icon - COM3
-            if (this.ParentForm.SystemConfig.SerialCOM3Mode == (int)Define.E_CommMode.f0_None)
-            {
-                this.pictureBoxCOM3Enable.Visible = false;
-                this.pictureBoxCOM3Disable.Visible = true;
-            }
-            else
-            {
-                if (this.ParentForm.SystemConfig.SerialCOM3Mode == 22 && this.ParentForm.SystemConfig.IsModbus == false)
-                {
-                    this.pictureBoxCOM3Enable.Visible = false;
-                    this.pictureBoxCOM3Disable.Visible = true;
-                }
-                else
-                {
-                    this.pictureBoxCOM3Enable.Visible = true;
-                    this.pictureBoxCOM3Disable.Visible = false;
-                }
-            }
-
-            // Icon - COM3
-            if (this.ParentForm.SystemConfig.SerialCOM4Mode == 0)
-            {
-                this.pictureBoxCOM4Enable.Visible = false;
-                this.pictureBoxCOM4Disable.Visible = true;
-            }
-            else
-            {
-                if (this.ParentForm.SystemConfig.SerialCOM4Mode == 22 && this.ParentForm.SystemConfig.IsModbus == false)
-                {
-                    this.pictureBoxCOM4Enable.Visible = false;
-                    this.pictureBoxCOM4Disable.Visible = true;
-                }
-                else
-                {
-                    this.pictureBoxCOM4Enable.Visible = true;
-                    this.pictureBoxCOM4Disable.Visible = false;
-                }
-            }
-
-            // 옵션보드
-            try
-            {
-                value = int.Parse(this.ParentForm.CurrentSystemParameter9507.OptionBoard);
-            }
-            catch
-            {
-                value = 0;
-            }
-            if (value == 1 && int.Parse(this.ParentForm.CurrentSystemParameter9508.OPT1SamplingCount) != 0) // Feedback
-            {
-                this.pictureBoxFeedbackDisable.Visible = false;
-                this.pictureBoxFeedbackEnable.Visible = true;
-            }
-            else
-            {
-                this.pictureBoxFeedbackDisable.Visible = true;
-                this.pictureBoxFeedbackEnable.Visible = false;
-            }
-        }
         public void PopUpWarning(string warning)
         {
             this.labelAlarmWindow.Text = warning;
diff --git a/ITC81DB_2/Version.txt b/ITC81DB_2/Version.txt
index 32bc3b1..bf17b09 100644
--- a/ITC81DB_2/Version.txt
+++ b/ITC81DB_2/Version.txt
@@ -14,6 +14,11 @@
 	2�� �⺻�� ������ �跮��
 */
 
+@ Ver 3.1.3 by CJY
+	- 2025.02.13
+	- Ver 3.1.2 Modify
+	- ���� Icon ���������� Enable �ȵǴ� ���� ����
+
 @ Ver 3.1.2 by CJY
 	- 2024.12.24
 	- Ver 3.1.1 Modify
diff --git a/ITC81DB_2/bin/Release/ITC81DB_2.exe b/ITC81DB_2/bin/Release/ITC81DB_2.exe
index 959c425..ce9d053 100644
Binary files a/ITC81DB_2/bin/Release/ITC81DB_2.exe and b/ITC81DB_2/bin/Release/ITC81DB_2.exe differ
diff --git a/ITC81DB_2/obj/Release/ITC81DB_2.exe b/ITC81DB_2/obj/Release/ITC81DB_2.exe
index 959c425..ce9d053 100644
Binary files a/ITC81DB_2/obj/Release/ITC81DB_2.exe and b/ITC81DB_2/obj/Release/ITC81DB_2.exe differ