Description
每次写入块与要发送到端口的数据一起传输时，模块将根据为端口设置的时序特性和当前消息立即发送数据。在发送消息时，端口2传输状态将包含一个非零的值。当端口完成写入请求的完全传输时，端口2传输状态的值为0。2.3.2写入块这些数据块用于将信息从Flex处理器传输到模块。用于传输此数据的输出图像的结构如下所示：字节偏移描述0块序列号（读取模块设置的块号）1此消息的字符间延迟（0到255范围内的字符之间的毫秒）。2要在端口1上传输的字符数（0到10）3为将来使用保留端口1 4到13要传输的端口1数据块序列号是通过模块上的输入图像在最后一次读取块传输时接收的数据。梯形图逻辑应将该值从梯形图逻辑中的输入图像的字节0复制到输出图像的字节零。这是构造写入块时执行的最后一个操作。当在输出图像的字节0中识别出新值时，模块的程序将触发进程写入块功能。如果写入块中要传输的字符数没有设置为零（字节2的字值），则块中存在要传输的数据。如果所选端口不忙于传输数据（端口2的传输状态为零），则块中的数据将移动到端口的传输缓冲区并发送到端口。
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