What is PSP, and did it replace the Logos real-time and historical protocols?
No. With LabVIEW 8.0, you can use the LabVIEW Shared Variable Engine for network connectivity and buffered data transfer. The LabVIEW 8.x DSC Module uses this engine by replacing its own tag engine with the Shared Variable Engine. The LabVIEW 8.x DSC Module is also a plug-in module to the Shared Variable Engine, with features such as alarming and logging. The Shared Variable Engine uses an enhanced version of the Logos and DataSocket protocols for server-client buffering and RT FIFO architectures for LabVIEW Real-Time target communication. This new protocol, the publish-subscribe protocol (PSP), is a DataSocket and Logos feature superset. However, Logos (installed via the LabVIEW DSC Module) acts like a plug-in to the Shared Variable Engine by adding the historical protocols (such as database and logging features) to the Shared Variable Engine.
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