如何为PLC实现Copress中继器算法

大家好，
我正在考虑为PLC实现Copress中继器算法（AN62497）。我的疑问是，如果我们有15个奴隶，而中继站不只是它旁边的1个节点，而是2个或更多的节点，如果我们没有100%个到达能力节点到节点（更少的说它可以在一个节点正确读取一个消息之前接受1-3个消息）。
根据对第2-3页中的AN62488文档的解释，如果中继消息在其前面达到2个节点，则2节点将停止重复消息，因为两个节点都接收到来自彼此的确认，并且加上这2个节点前面的节点尚未接收到消息。事实上我们没有达到100%的能力。在这里，我试图通过一个方案来解释场景：A -B-C--D -E-F-G-H-I--L A想与L A通信，向L发送了直接消息，不能看到A，发送广播消息。B和C从A接收广播消息，在直接消息到L之后，都发送广播消息。两者都收到对方的确认，所以他们停止重复消息。现在，如果没有其他节点（D，E，…）接收到来自B和C的广播消息（坏运气），则消息丢失并且永远达不到L。我的问题是：如果另一个节点没有以100%确定的消息接收到消息，该算法是否有效。谢谢你的支持。-J



     以下为原文
  Hi everyone,
     I am considering implementing Cypress repeater Algorithm for PLC (AN62487). My doubt is if we have 15 slaves and the repeater reaches not just 1 node next to it but 2 or more nodes and if we don't have 100% reach ability node-to-node (less say it could take 1-3 messages before one node reads correctly a message).
        According to the explanation of AN62487 document on page 2-3 it seems that if a repeater message reaches 2 nodes ahead of it, the 2 node will stop repeating the message because both receive a confirmation from each other and plus the nodes ahead of these 2 have not received the message yet due to the fact we don't have 100% reach ability.   
             
        Here I try to explain the scenario trough a scheme:   
             
        A--B--C--D--E--F--G--H--I--L   
             
        A wants to communicate with L.   
             
        A has sent direct message to L, which can't see A, A sends broadcast message.   
        B and C receive the broadcasted message from A.   
        After direct message to L, both send broadcast message. Both receive a confirmation from each other so they stop repeating the message.   
        Now, if none of the further nodes ( D,E, ...) has received the broadcasted message from B and C (bad luck), the message is lost and never reach L.   
             
        My question is: Does the algorithm works if a node next to another does't received with 100% certainty a message.      
        Thank you in advance for the support.     
             
        - J