Specifies the update's scan time of OPC Tags from an OPC Group used by the OPC Server. This property is represented in milliseconds and it can be modified after starting communication, and it is used only when the Enable property is set to True. When configuring this property in several OPC Tags of an application, users must increase the value of this property on those OPC Tags from an OPC Group that do not vary very much in the device, enabling other OPC Tags from an OPC Group with higher priority to be read more frequently, thus enhancing application's performance and responsiveness. The default value of this property is 1,000.