Real Time Commands

The following commands provide an application interface to the printer even when the printer is not handling other commands (RS-232C communication interface only):

1.Real Time Status Transmission (GS Sequence and DLE Sequence)

2.Real Time Request to Printer (GS Sequence and DLE Sequence)

3.Real Time Printer Status Transmission

The Batch Mode Printer Status commands are placed in the data buffer of the printer as they are received and handled by the firmware in the order in which they are received. If the paper exhausts while printing data that was in the buffer ahead of the status command, the printer goes busy at the RS-232C interface and suspends processing the data in the buffer until paper is reloaded. This is true for all error conditions—knife home error, thermal print head overheat, and so forth.

The Real Time commands are implemented in two ways to correct these problems. Both implementations offer the same functionality; the choice if the user depends on the current usage of the application.