Printek FP5000 series, User Manual

Page: 186 / 201

User guide Interfaces
173
Protocols
Memory mode XON/XOFF The received characters are stored in a FIFO buffer (first in/first out).
The characters are processed in this buffer.
The buffer capacity can be adjusted from 0 to 128 Kb.
If the buffer is full, the interface signals NOT READY (signal ac-
knowledgement: Level 1, -12 V) and XOFF (hex. 13, dec. 19). This
results in stopping the data transmission. When the FIFO buffer is
empty again, the interface signals READY (level 0, +12 V) and XON
(hex. 11, dec. 17). Data transmission can be continued.
In addition, the READY signal is influenced by the status of the print-
er (On/Off Line). If the printer assumes an undefined state, the inter-
face also signals NOT READY and XOFF.
Memory mode Robust XON/
XOFF Robust XON/XOFF is similar to XON/XOFF. However, the state of
the printer (XON or XOFF) is also periodically transmitted via the
TxD line in the case of Robust XON/XOFF.
Extended menu functions with
the ENQ/STX and ETX/ACK
protocols selected
Interf.
Buffer
Blockend
Serial
Baud
Protocol
ErrMode
OFF
ON OFF
ON
ETX/ACK
ENQ/STX
ROBUST XON/XOFF
XON/XOFF
OFF
ON OFF
ON
Remote Handthr.
Format
Special
1)
1) This menu option is only
displayed if either the ENQ/
STX or the ETX/ACK pro-
tocol is activ.