Hello

Event data is acquired continuously at 5-second intervals from the Prosys OPC Simulation Server using uaClient.historyReadEvents().

＞　HistoryReadResult[] results = uaClient.historyReadEvents(nodeIds, DateTimeUtil
＞　DateTimeUtil.toDateTime(readEndDate), UnsignedInteger.valueOf(0), even
＞　TimestampsToReturn.Source);

The event data to be acquired is defined as standard in the Prosys OPC Simulation Server
Address Space tab, Objects>MyObjects>MyDevice, and alarm data is acquired.
The number of events to be acquired is 200 items of data for the same MyDevice.

When acquiring event data continuously for 7 hours under the above conditions, the acquisition time tends to increase gradually, and it was about 15 milliseconds at the first time, but after 7 hours it has increased to about 59 milliseconds. It has increased by 44 milliseconds in 7 hours. I estimate that these differences will exceed 5 seconds after 113 hours have passed.

Are these issues limited to the free version of Prosys OPC Simulation Server?
Has this been resolved in the paid version?

The version of Prosys OPC Simulation Server used is as follows.
Product Version:5.5.2-362
SDK Version:5.2.8-159

Thanks,
Miya