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The sequence of communication between the Nucleo blocker and Rx-Universe is:
1) Rx-Universe will select the block base/diameter to use and print it on the work ticket.
2) The operator either selects blocks and places them in the tray, or the Nucleo will select blocks from the internal carousel.
3) The Nucleo requests job information from Rx-Universe using a standard VCA request.
4) The Nucleo scans the barcode on the block, and sends the block ID to Rx-Universe using LDCS, command 1100. Rx-Universe responds with data on the block, if it has been previously used, or with an identifier that this is a new block. It also sets the _BLKRU label to "1" if the block can be re-used, or "0" if it cannot be re-used. If the block cannot be re-used, the appropriate message is displayed on the blocker.
5) If the block is usable, the blocker then sends an LDCS command 1101, which identifies the job and eye being used for the blockpiece, allowing Rx-Universe to link the blockpiece to the job.
56) After blocking, the blocker sends information on the combined block and blank to Rx-Universe using standard VCA protocol.
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