19
Buffer full cancellation in X-ON / X-OFF mode (the following is an example in
the Combination mode).
A) Buffer set to “big size” (4K-bytes) (set with sip switch 2-3)
B) Buffer set to “big size” (45-bytes) (set with sip switch 2-3)
Printer setting conditions Description of operation
• When in Star mode and memory switch
is set to “0”
• ESC/POS emulation
When available buffer space drops below
256 bytes, exactly one byte is output for
X-OFF. When data in the buffer drops
below 256 bytes, exactly one byte is
output for X-ON.
• When in Star mode and memory switch
is set to “1” When available buffer space drops below
256 bytes, an X-OFF signal is output for
each byte of data received. When data in
the buffer drops below 256 bytes, and X-
ON signal is output.
Data buffer
Full Near Full
Near Empty Empty
X-OFF X-ON
Remainder
256 bytes 256 bytes
Data buffer
Full Near Full
Near Empty Empty
X-OFF X-ON
Remainder
16 bytes 16 bytes