Communication delay between OPC and LabVIEW

[azadplc007]

Dear all,

              I want to communicate LabVIEW and Delta PLC. There is no problem in communication between PLC and NI OPC. But I am facing major time delay in communication between NI OPC and LabVIEW. and after sometime I am getting error as below. 

How to rectify this... Any idea..?

[azadplc007]

Hi..

I found the major time delay during writing value. During reading there is no much time delay...