diff --git a/scripts/tcp5p28.gd b/scripts/tcp5p28.gd
index 865ecb31..4cb5c9c0 100644
--- a/scripts/tcp5p28.gd
+++ b/scripts/tcp5p28.gd
@@ -45,6 +45,11 @@ class TCP5P28 extends unit.Unit:
     signal get_interfers(unit: TCP5P28)               ## Запрос состояния выполнения целеуказания.
 
     var tx_stack: Array                ## Массив пакетов для отправки.
+    var ext_cu = false
+    func _init(nm) -> void:
+        super._init(nm)
+        ext_cu = ProjectSettings.get_setting('application/config/external_cu', false)
+        ProjectSettings.connect('settings_changed', on_setting_changed)
 
     func _to_string() -> String: return String('5П-28: "%s" %s ' % [self.name, ['отключен', 'на связи'][int(online)]])
 
@@ -60,8 +65,7 @@ class TCP5P28 extends unit.Unit:
                 emit_signal('get_threats')
             if cmd_type == CMD_TYPE_STATE:
                 emit_signal('get_interfers')
-            var external_cu = ProjectSettings.get_setting('application/config/external_cu', false)
-            if cmd_type == CMD_TYPE_IN and external_cu:
+            if cmd_type == CMD_TYPE_IN and ext_cu:
                 set_interfer(data)
 
     func process(tick: int):
@@ -181,3 +185,6 @@ class TCP5P28 extends unit.Unit:
         var data_to_send: PackedByteArray = create_header(data_len)
         data_to_send.append_array(data_tx)
         tx_stack.append(data_to_send)
+
+    func on_setting_changed():
+        ext_cu = ProjectSettings.get_setting('application/config/external_cu', false)