The communication Port1 failure after run 3 months,and now communication port1 is not stable.It can failure anytime.I can't solve my problem. - Attach Fault Table 2 files. - Attach SNPX Function Box other environment status such as ,when communication failure Port1 LED Status not show. my hardwareconfig CPU363 Port1-232 SNP-Master Communicate between 9030 to VersaMax,Port2-485 Asc for Tempcontroller,PS Port SNP-Slave for SCADA Thank you. Kait.^^