Unisys manual EFP9800 ESC/POS Commands

EFP9800 ESC/POS Commands

Do not use this command within the data sequence of another command that consists of two or more bytes. For example, if you send the Set Line Spacing (ASCII code ESC 3 n) to the printer, and a Real Time Request to Printer command (10 05 n) interrupts before n is received, the code 10 for 10 05 n is processed as the value of n for ESC 3 n.

The Real Time Request to Printer command is transmitted any time the command sequence 10 05 (1 ≤ n ≥ 3) is received, even if the sequence is part of another command.

n= 1 is available for errors.

n= 2 is available for errors. The printer retains settings, such as Line Spacing and Print Mode, that were in effect when the error occurred. Use the Initialize Printer command (1B 40) together with this command to completely initialize the printer. This command is enabled even if the printer is unselected using the Select Peripheral Device Status command (1B 3D).

n= 3 is available only when the printer is waiting for the insertion of a slip. It is ignored in all other states. Before performing this command, use the Real Time Status Transmission command (10 04 n) to ensure that slip is selected and that the printer is in the slip waiting state. After the printer is released from the slip waiting state, journal paper is selected. After the slip waiting state is canceled, the receive and print buffers are cleared. This command is enabled even if the printer is unselected using the Select Peripheral Device Status command (1B 3D).

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