M-S Cash Drawer A794 - Manual (Page 117)

Chapter 6: Programming Information A794 Owner’s Guide
December 1999 112
Busy Line and Fault Conditions
If the printer is in error condition (cover is open, paper is exhausted…), the printer will
still accept data, respond to the batch mode status commands (1B 76 and 1B 75 0),
handle the cash drawer commands, and not go busy until it actually tries to execute a
print command. Then it will stay busy and stop processing data out of the receive buffer
until the condition clears. It will respond to the Real Time commands as described
below.
Real Time Status Transmission
GS Sequence DLE Sequence
ASCII GS EOT n DLE EOT n
Hexadecimal 1D 04 n 10 04 n
Decimal 29 4 n 16 4 n
Value of n: GS/DLE Sequence
1 = Transmit printer status
2 = Transmit RS-232C busy status
3 = Transmit error status
4 = Transmit receipt paper status
Transmits the selected one byte printer status specified by n in Real Time according to
the following parameters. This command includes two sequences: GS (1D) and DLE
(0x10).
Exceptions
The command is ignored if n is out of range.
An application using DLE (0x10) sequence must send EOT within 100 milliseconds of
DLE or the printer will misinterpret the DLE and execute a Clear Printer command.
Avoid this possibility by using the ID 04 n sequence, which is handled exactly the same
as 10 04 n.
Unlike the A793, that had a dedicated connector and resultant dedicated status
reporting for each cash drawer, the A794 has a single connector that shares data
reporting from either cash drawer. When either cash drawer is open, an open status
is reported by the printer.
Related Information
1 = Transmit Printer Status
Bit Status Hex Decimal Function
0 Off 00 0 Fixed to Off.
1 On 02 2 Fixed to On.
2 Off
On 00
04 0
4 One or both cash drawers open.
Both cash drawers closed.
3 Off
On 00
08 0
8 Not busy at the RS-232C interface.
Printer is Busy at the RS-232C
interface.
4 On 10 16 Fixed to On.
5 Undefined.
6 Undefined.
7 Off 00 0 Fixed to Off.