OPC Collector Specific Configuration
The Configuration tab displays the following information.
| Field | Desciption |
|---|---|
| OPC Server Prog ID | The Program ID for the OPC Server that you want this collector to connect to. |
| Read Mode | Cache or Device, indicating the type of OPC reads the collector should perform. To change the mode, select the other option from the drop-down menu. Refer to your OPC Server documentation for more information. |
| First Browse Criteria | Top-level search criteria for browsing tags from the data source. Top-level and second-level criteria are ANDed together for the browse. The final browse criteria, therefore, consists of a combination of first-level and second-level criteria ANDed together |
| Second Browse Criteria | Second-level search criteria for browsing tags from the data source. Top-level and second-level criteria are ANDed together for the browse. |
| Threading Model |
The type of threading model selected for this collector. The model selected must match the threading model of the OPC Server. The default setting is multithreaded. Refer to your OPC Server documentation for more information. It is recommended that you configure your OPC Collector to use the default Multi threading model. Some OPC Servers do not work well with Multi threading. If you experience problems running your OPC Collector with Multi threading, change the threading model setting to the Apartment model. |
| Configuration Changes |
Whether your OPC Collector configuration changes are processed in real time or after shutting down and restarting the collector. Select the Made On-Line option to process any configuration changes immediately (after 30 seconds) when you click the Update button. Select the Made After Collector Restart option to hold all configuration changes until you manually stop and restart the OPC Collector. NOTE: To allow configuration changes, you also must enable the On-Line Tag Configuration Changes option on the Advanced tab of the Collector Maintenance screen. To manually restart the OPC Collector, stop and start the collector through the Services dialog box if you are running your OPC Collector as a service. For more information, refer to the Configuring an Historian Data Collector for Automatic Startup section of the Historian Data Collectors manual. If you are not running the collector as a service, open the OPC Collector's console window, type s, and press enter to shut down the collector. For more information, refer to Running Collectors as Console Applications section of the Historian Data Collectors manual. Starting and stopping the collector in the General Tab of the Collector Maintenance screen does not constitute a manual restart. You must either start and stop the collector from the Services dialog box or the Console application. Note: Certain OPC Servers cannot handle processing configuration changes online. If you experience any instability with changes made online, it is recommended that you set the Configuration Changes field on the Configuration tab of the OPC Collector to Made After Collector Restart. |