800xA - OPC Connectivity Problem
System : 800xA 5.1 RevA FP1,
I am facing the problem in opc communication in 800xA system, that is OPC is not communicating to connectivity server for every 15 day’s once, This problem I am facing last 3 month before that plant is running good.
The following observations are below at time of problem occurred.
1. OPCDA is not communicating with controller but the controller (PM864A) in run Mode and same there is no fault indication in the hardware’s and also application running properly.
2. Then I can't able to go online or download to the controller even though Controller IP is pinging properly and In RNRP, Controller IP is detecting properly and windows OPC service is also working properly and same no 3 rd party application is also running in the server (ie., antivirus software).
3. After power recycle to the controller, there is no program in the controller but battery (SB822) is working fine. Then download the program to the controller then only OPCDA communication will get healthy and same with 800xA connect.
4. Error found in the OPC log file was Conn Err OPC Server 5500 Conn Error to DA Subscribe Controller.
can anyone suggest me how to overcome this issues.