RD-KT247 thermal printers
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OFF
X-ON/X-OFF
control
Data can enter
The signal line ‘2’send out the
X-ON code ‘11H’
Data can’t enter
The signal line ‘2’send out the
X-OFF code ‘13H’
2.1.4Lack of paper selecting bit
SW5
说
明
ON
When the printer is lack of paper, it will stop printing, and online
the indicator light
glows green and will be continuous glint
to alert the lack of paper.
OFF
When it is OFF, the printer will not respond for the lack of paper.
2.1.5Data transmission method of
serial interface
The receiving buffer of the printer is 16K
(1) When the number of sending data once is less than 16K, the data can be directly sent. And the
sending method is as follows:
(2) If large amounts of data once is sent, need to judge the mark ‘CTS’ when sending the data.
When the mark is ‘1’, the data can’t be sent. When the mark is ‘0’, the data can be sent.
Data can be sent in the form of packets or byte. When the data is sent in the form of
packets, each data packet can’t exceed 256 bytes, and the sending flowchart is as
follows:
Use the data
wire
to
connect
the
upper
computer
to
Configure the
communication
methods
of
the
upper computer
Power on the
printer
and
load
the
printing paper
S e n d d a t a
+ e n t e r