Specifications

Programmers Guide TH230/TH230+
124
• Functions 65, 66 or 67 write data to a non-volatile memory. Note the
following items when using the function.
• The printer may be BUSY when storing data and will not receive any
data. In this case, be sure not to transmit data from the host.
• Excessive use of this function may destroy the non-volatile memory.
As a guideline, do not use any combination of the following commands
more than 10 times per day for writing data to the non-volatile
memory: FS q, GS ( E (part of functions), GS ( L (part of functions), GS g
0, and FS g 1.
• The following restrictions apply when performing non-volatile memory
operations (including data store and delete).
• The paper cannot be fed by paper feed switch.
• The real time command must not be executed.
• The ASB status will not be sent, even when the ASB function is set to
enable.
Notes for
transmission
process:
• Data send operations are performed using Functions 48, 51 and 64.
• The printer enters the BUSY state just before the data header is sent.
After NUL has been sent, the printer enters the READY state (except
when other factors cause it to enter the BUSY state).
• During the interval between the sending of the data header and NUL,
ASB status and the real time commands are rendered invalid.
• When operating with a serial interface, be sure to configure operation
so that the host computer only uses the printer when it is READY.
• When operating with a parallel interface, the data sent by this function
(starting with Header and ending with NUL), as with other data, is first
stored in the send buffer, then output in sequential order when the
host computer changes to the reverse mode. Note that the send buffer
capacity is 99 bytes, and any data exceeding this volume limit will be
lost; therefore, when using this command, it is important to configure
the operation so that the host computer’s change to the reverse mode
and the subsequent status send/ receive process is performed quickly.
Notes for
ESC/POS
Handshaking
Protocol:
• It will be necessary to perform the ESC/POS Handshaking Protocol
procedures listed below when using Function 64.
Procedur
e
Host operation
Printer operation
1 GS ( L sends Function 64. Function 64 is initiated.
2 Data is received from
printer.
Key code list is sent.
3
Response code (*1) is
sent.
Procedures (*2 and *3) are
performed according to
response code.