请问我安装了一个PCLTA20和Echelon的LonPoint设备连接，以前用控制面板中的LonWorks Plug & PLay进行通信诊断测试时，按Service Pin键总可以看到通信成功。但现在测试时总是失败，失败信息如下： LonWorks? PCC10/PCLTA10/PCLTA20 Device Driver Version: 1.06 Card Type: PCLTA-20 Driver Status: Number of Free LTA Output Buffers- Non-Priority: 0, Priority: 0 Loaded Image Size: 49408 Interrupt Count: 0 Now waiting for a service pin message. Received service pin, pinging node: Neuron ID: 00 05 71 42 07 00 Program ID: 80 00 01 01 01 01 03 21 ** Ping Failed ** -- -- -- -- -- -- -- -- -- -- Now waiting for a service pin message. Received service pin, pinging node: Neuron ID: 00 05 71 42 07 00 Program ID: 80 00 01 01 01 01 03 21 ** Ping Failed ** Received service pin, pinging node: Neuron ID: 00 A0 56 99 72 00 Program ID: 80 00 01 01 14 8A 04 03 ** Ping Failed ** 线路我没动过，应该没问题。我甚至重新安装了机器，都还是同样问题。请问各位大侠这如何解决？ 多谢先