1 用途
指示灯元件通常用来显示设备或IO点的状态。相比按钮型元件、开关型元件，指示灯元件没有事件处理功能。
2 样式
默认指示灯如下：
通过将指示灯元件与设备变量绑定，同时设置不同状态值下显示的图片来实时显示设备状态。
3 属性
3.1 控件
控件名，当前页面唯一。
3.2 启用标签
是否显示元件图片中设置的文本或多语言标签。
3.3 元件类型
1）单状态
默认单状态，只有0/1两个状态值，元件图形属性中不能添加其它值，
2）多状态
设置为多状态，可以设置多个状态值。
3.4 状态变量
设置显示的变量。
3.5 元件图片
设置不同状态值下控件显示的按钮图形。
可以选择内置的矢量图形库或插入自己设计好的图片，图片格式支持JPG、PNG等。
3.6 缩放模式
缩放图片填充控件：图片适应控件大小；
缩放控件到图片大小：控件大小适应图片的原始尺寸。
3.7 动画效果
参考2.1节控件属性之动画效果
3.8 可见控制
参考2.1节控件属性之可见控制
3.9 闪烁效果
参考2.1节控件属性之闪烁效果
4 用法示例
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