Epson TM-T88III Printer User Manual


 
CONFIDENTIAL
Paper roll Bit-image commands GS ( L GS 8 L
Ver. 10.01 p. 217
During the interval between the sending of the data header and NUL, ASB status and the real time
commands are rendered invalid.
When communication with the printer uses XON/XOFF control with serial interface, the XOFF code may
interrupt the “Header to NUL” data string.
The information for each function can be identified to other transmission data according to specific data
of the transmission data block. When the header transmitted by the printer is [hex = 37H/decimal =55],
treat NUL [hex = 00H/decimal =0] as a data group and identify it according to the combination of the
header and the identifier.
[Notes for ESC/POS Handshaking Protocol]
It will be necessary to perform the ESC/POS Handshaking Protocol procedures listed below when using
Functions 64 and 80.
(*1) Response Code
Procedure Host operation Printer operation
1 This command 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.
ASCII Hexadecimal Decimal Request definition
ACK 06 6 Send next data group.
NAK 15 21 Resend just-received data group.
CAN 18 24 Cancel send operation.