So I am writing a monitoring application to monitor a Kepware OPC server.
To test I am trying to fetch about 1500 records.

First I did this in a loop, for each, and noticed the speed was 200-900ms per. That's dog slow.

Second I read about GetMultiplePropertyValues.
Fetching all 1500 records will return in 10 seconds, with all values reported as "Timeout getting item property value. "

I continued to read samples and saw someone broke it into groups of 25. So I tried to do groups, and anything over 20 or so records returns a timeout for all values after the same 10 seconds.



I noticed the Timeouts() values are all set to 60 seconds, not 10.

1. Is this slowdown due to me being a Trial user?

2. Is this speed normal?

3. Why am I getting timeouts @ the 10s mark when the settings are all clearly 60s? Am I missing a timeout setting somewhere?

4. Why am I getting all timeouts for > 20 records?

Note: Comparing this to a few random, google searched, OPC Browsers; I was able to fetch results in < 20ms compared to the 200~900 using easyDAClient1.