Specifications

Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET NEXT
D
TM-U230 series
Specification
(STANDARD)
App.14 App.13
APPENDIX E: TRANSMISSION STATUS IDENTIFICATION
The values of specific bits are fixed in the status information transmitted by the printer, so that the
status bytes of commands can be identified. The user can therefore confirm the command to which
the status belongs, as shown in the following table.
When using Auto Status Back (ASB), however, process the consecutive three-byte code (except
for XOFF) as ASB data after confirming the first byte of the ASB. Otherwise, the status
transmitted by using the
GS
I and the status of the second and following bytes of the ASB cannot
be differentiated.
Table E-1 Transmission Status Identification
Command Status Reply
GS
I
II
I
<0∗∗0∗∗∗∗>B
GS r
<0∗∗0∗∗∗∗>B
XON <00010001>B
XOFF <00010011>B
DLE EOT
<0∗∗1∗∗10>B
ASB (1st byte)
<0∗∗1∗∗00>B
ASB (2nd byte - 4th byte)
<0∗∗0∗∗∗∗>B
When the printer receives a header (<5F>H) transmitted with GS I
II
I n (n = 65 to 69), status
identification must not be performed until NUL (<00>H) is received.