[求助-西门子PLC300/400]FB块无法调用问题求教 - 百度知道
09 September 2025 admin
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这是调用FB块的标准方法。 创建背景数据块： 必要性：每次调用FB块时，都需要为其创建一个背景数据块，用于存储FB块的实例数据。 步骤：在调用FB块后，系统会自动提示你为其指定一个背景数据块。 通常，你会选择一个尚未使用的数据块编号，如DB1。
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