Enq/Stx Protocol; Etx/Ack Protocol; Management - Tally Dascom 2810 User Manual

Options and accessories

ENQ/STX protocol

In addition to this XON/XOFF message, the possibility exists of requesting a
status byte from the printer using the ENQ code (hex. 05, dec. 5). The STX code
(hex 02, dec. 2) is used to clear any error messages (parity error, buffer
overflow).
Status byte Bit 0 – 1
STX (hex02)
ENQ (hex05)
XON/XOFF
HandThr.=
HandThr.=

ETX/ACK protocol

ETX (hex03)
ACK (hex06)
XON/XOFF
HandThr.=ON
HandThr.=OFF When the printer receives an ETX, it returns an ACK to the

Management

 Web Panel
 HP Web Jet Admin
 E-Mail notification with SMTP
 TallyCom Print Guide
 Pre-string, Post-String
164
BUSY
Bit 1 – 1 Off Line
Bit 2 – 0 Paper end
Bit 3 – 1 Always 1
Bit 4 – 1 Cover open
Bit 5 – 1 Buffer overflow
Bit 6 – 1 Parity or frame error
Bit 7 – 0 Always 0
Clears any previous parity or framing error as well as any buffer
overflow error.
The current printer status is sent to the host.
This protocol is automatically used for data flow control and
printer status handling.
ON The STX and ENQ characters are not filtered out of the
data stream and control the interface in addition.
OFF The STX and ENQ are filtered out of the data stream and
handled immediately by the interface.
Block end character
Acknowledgement informing the host that further data may be
transmitted.
This protocol is used in addition to data flow control and printer
status handling.
An ETX is not acknowledged by ACK before all previously
arrived data have been printed.
host. Any previously sent data or blocks may still be present in
the printer buffer.
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