Summary of the OPC Classic HDA collector Features

The OPC Classic HDA collector is a 64-bit compatible collector and it does not support 32-bit operating systems. The following table outlines the features of the OPC Classic HDA collector.

FeatureCapability
Browse Source for TagsYes (on an OPC Classic HDA server that supports browsing)
Browse Source for Tag AttributesYes
Polled CollectionNo
Minimum Poll IntervalNA
Unsolicited CollectionYes

If you are using an OPC Classic HDA collector with unsolicited data collection and have collector compression disabled, all new values should produce an exception. When the OPC Classic HDA collector is doing unsolicited collection, the deadband percentage is determined by the collector deadband percent. You can only configure the collector deadband percent by enabling compression.

Timestamp Resolution1ms
Accept Device TimestampsYes
Floating Point DataYes
Integer DataYes
String DataYes
Binary DataYes
Python Expression TagsNo
Note: You must set the Time Assigned by field to Source if you have unsolicited tags getting data from an OPC Classic HDA collector.