The following are practical examples for combining your primary poll rates and access times to help you configure your items.
Example 1
- PollRec1
- Poll Rate = 10 seconds
- Access Time = 5 minutes
In this item, the OPC Client polls every 10 seconds for five minutes. If no requests are made within five minutes, the item is disabled and the OPC Client stops polling PollRec1.
Example 2
- PollRec3
- Poll Rate = 10 seconds
- Access Time = Disabled
The driver always polls PollRec3 at 10 seconds with this configuration because the access time is disabled.
Example 3
- PollRec4
- Poll Rate = Disabled
- Access Time = Disabled
The driver does not read messages from PollRec4 on the device. Instead, the OPC Client updates the item when it receives data from the OPC server.
