Professional OPC
Development Tools


× If you are developing in .NET, but are using the OPC-UA (OPC Unified Architecture), please post in the QuickOPC-UA category instead.

Read performance [was: QUICKopc Client application missing the values and not retaining back]

23 Apr 2018 02:21 #6254 by SENTHILKUMAR
Dear Z,

adding to the previous issue, our expected number of tags to read is 1000 tags. but right now we are reading only 250 tags. we are waiting for 1 second and reading another 250 tags. and cycle repeats upto 4 cycles

whenever we are loosing the tags, we are getting the below error.

"Read not completed. This error indicates that it could not be verified that the requested read operation was completed during the timeout period. It is possible that the read operation will actually succeed or fail, but later. Increase the timeout period if you want to obtain positive or negative indication of the operation outcome. Other reason for this error may be that under heavy loads, topic request or response queue is overflowing. Check the event log for queue overflow errors (if event logging is supported by the product and enabled). -Unknown"

i am already keeping timeout of 30 seconds in my code. i think 30 seconds is not bad value.

is there any any quick OPC specified Event log is available to understand clearly. or we can go ahead with >net based Event log to get the clear idea.

we want to find a solution for this error.

i think we had given you most of the information.

Please Log in or Create an account to join the conversation.

Moderators: support
Time to create page: 0.155 seconds


 Recommend this on Google