Overview of the VCR Facility
The VCR facility enables you to record changes in value (events) of variables on one PcVue station and to play them back through mimics on another.
The same version of PcVue must be installed on both the recording station and the playback station.
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A VCR type archive unit must be created on the recording station to store the events data, typically on the archive server. The variables to be recorded must have the VCR property enabled. No other special configuration is required; the rest of the project can be the same as any other.
The playback station must be in the list of clients (consumers) of the VCR type archive unit. It does not record events directly. Instead, recorded data are downloaded from the archive unit on the recording station (producer).
PcVue on the playback station is started with the command line argument -VCR. This causes all variables to be switched to simulation mode and the VCR playback dialog to become available. The VCR playback dialog is used to control the synchronization of data from the recording station and play back the events derived from the real-time values of the variables. The VCR playback dialog can be controlled with SCADA Basic scripting. See the instruction SVVCR for details.
The archive unit on the recording station can be smaller than that on the playback station as the playback station downloads and saves new archives from the recording station each time it is started.
The VCR facility and the VCR-style dialog used to play back reports through a mimic (F12, Report Selection and Replay) are entirely different and separate features.