You can use e.g.

easyDAclient = new EasyDAClient();
easyDAclient.InstanceParameters.HoldPeriods.TopicRead = 300000;
easyDAclient.InstanceParameters.HoldPeriods.TopicWrite = 300000;


Best regards

Investigations with OPC Analyzer etc. take time and effort. There is no need to make that effort if the behavior is to be expected.

What does the OPC server vendor say about expected time needed to perform an OPC Write, under various conditions?

I have sent a direct link to the email address registered with your account.

Yes, OPC Writes are not done in one step. Internally, a call to OPC method AddItems must be made for any particular item first, only then the actual Write can be made. We handle this internally for you, therefore the first Write involves more than subsequent ones. The effect of AddItems is reverted by a call to RemoveItems, and we call that when the item is no longer "in use" for some time, which is configurable (a "hold period"). This could be the reason. I must say, however, that if AddItems (for 1 item) inside the OPC server is largely responsible for this delay, it would be an unusually slow implementation. Either way, doing the OPC Analyzer trace would be beneficial.

Best regards

It can be because you need to be logged into the site for the file to be accessible (which may be difficult to do if you are clicking on the link in the email); or it can be other problem on our side. You can try this alternative sequence:

1. Log to the site.
2. From the top menu, select Resources -> Product Information
3. In the left menu, select Knowledge Base.
4. In the Knowledge Base, navigate to Tools -> Restricted.

In case you still get problems, let me know, allowing the access is done manually and it is sometimes problematic. Also, please log out first if you have been logged in from earlier time, because the account permissions have been changed, to make sure the system picks them up.