HP Designjet 600 Printer - Data Loss or Communication Problems with HP/GL Files
When using the RS-232 I/O port of the original Designjet (C1633A/B) or the Designjet 600 printers (C2847A/C2848A) at 38.4K baud rate, data loss or communication failure may occur when receiving HP-GL files. This is caused by a timing problem when parsing Device Control Instructions used by the HP-GL language. Using HP-GL/2 does not have this problem when operating at 38.4K baud.
Since Device Control Instructions must be parsed immediately when received, the processor may miss incoming data while parsing these special instructions. Using 19.2K baud is the best alternative. This allows the processor more timing margin to parse the Device Control Instructions while receiving HP-GL instructions. Another alternative would be to change software to one that uses an HP-GL/2 driver (HP-GL/2 does not use device control instructions).
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