Digital Press to Binder..."Hello, Are You There? Hello?"
With high-speed continuous printers, it gets a lot more complex. First you have to cut the web to the desired sheet length. Then the sheet (or folded sheet) gets passed to the binder or stitcher at very high input speeds.
Right now, this communication between printer and postpress is handled via printed codes. A variety of instruction codes are printed on the web (barcode, OMR marks, QR codes) and then read by the cutter - sheeter - stacker and the stitcher or binder running behind these. The printer can perform certain functions for postpress, such as providing blank paper to "clear out" the downstream devices after a fault, or job end. But if there is a problem further on down the line, the finishing system doesn't really talk directly to the printer as to which book, in which job, has an issue. Nor does it create a reprint file automatically.
It would be nice if that sort of back-and-forth communication were on the horizon, but it won't happen until a common language for doing this is adopted by the printer community.