
7156 Owner’s Guide Commands
October 1995 107
Printer Status Commands
These commands enable the printer to communicate with the host system
following the selected handshaking protocol, either DTR/DSR or XON/XOFF.
They are stored in the printer's data buffer as they are received, and are handled
by the firmware in the order in which they were received.
When a fault occurs, the printer will go busy at the RS-232C interface and not
respond to either of the Printer Status commands. If the fault causing the busy
condition can be cleared, such as by loading receipt or slip paper, or letting the
thermal printhead cool down, the printer will resume processing the data in its
receive buffer.
If a slip jam caused the busy condition and the application is not using Real Time
commands for status and recovery, clear the jam and press the online button to
cycle the printer. See the following section, “Real Time Commands” for details
about the Real Time commands.
Transmit Cash Drawer Status
Transmits the current status of the cash drawers. One byte is sent to the host
system. In DTR/DSR protocol, the printer waits for DSR = SPACE. If a drawer is
not connected, the status will indicate it is closed.
Hex Decimal ASCII Bit 1 Signifies 0 Signifies
1B 75 0 27 117 0 ESC u 0 0 Drawer 1 Closed Drawer 1 Open
1 Drawer 2 Closed Drawer 2 Open
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