产品详情资料这是用于告诉PROFIBUS驱动程序新的非循环
消息已准备好发送。如果此位置的值为零（0），则不会显示任何消息
发送。如果该值不为零，则PROFIBUS驱动程序将发送一个非循环
使用单词1到144的内容的消息。这个握手词应该
只有在完整的非循环消息存储在
偏移量1至144。PROFIBUS驱动程序将非循环消息添加到
队列，此寄存器将设置为零（0），以便消息不会重复
指示可以准备新的非循环消息。
注意：检查单词145的值，以确保其已设置
设置之前将其设置为零（表示没有非循环消息等待处理）
将该单词设置为非零值，从而触发非循环消息。这将有助于避免
非循环数据冲突和数据丢失。This is the handshake word used to tell the PROFIBUS driver when a new acyclic
message is ready to send. If the value at this location is zero (0), no message will be
sent. If the value is not zero, then the PROFIBUS driver will send an acyclic
message using the contents of words 1 through 144. This handshake word should
be set to a non-zero value only after the complete acyclic message is stored in
offsets 1 to 144. After the PROFIBUS driver has added the acyclic message to the
queue, this register will be set to zero (0), so that the message is not repeated and to
indicate that a new acyclic message may be prepared.
NOTE: It would be a good practice to check the value of word 145 to be sure it is set
to zero (indicating that no acyclic messages are awaiting processing) before setting
this word to a non-zero value, triggering an acyclic message. This will help avoid
acyclic data collisions and data loss.
