ETX/ACK protocol
ETX (hex03)
Block end character
ACK (hex06)
Acknowledgement informing the host that further data
may be transmitted.
XON/XOFF
This protocol is used in addition to data flow control and
printer status handling.
HandThr.=ON An ETX is not acknowledged by ACK before all previous-
ly arrived data have been printed.
HandThr.=OFF When the printer receives an ETX, it returns an ACK to
the host. Any previously sent data or blocks may still be
present in the printer buffer.
ACK/NAK protocol
STX (hex02)
Clears any previous error status.
ETX (hex03)
Block end character
ENQ (hex05)
Printer status enquiry (see ENQ/STX).
ACK (hex06)
Acknowledgement character; block was transmitted
successfully.
NAK (hex15)
Block transmission error.
DEL (hex7F)
Deletes the whole block; acknowledged by ACK or NAK.
HandThr.=ON Does not filter out the STX, ENQ, ETX, DEL characters
from the data stream (transparence). However, they are
also used for block control.
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Reference manual
Interfaces
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